How to Repair and Paint a Plastic Bumper Cover For Beginners - Part II
Summary
TLDRDans cette deuxième épisode de la série vidéo sur la réparation et la peinture d'un pare-chocs en plastique, l'animateur détaille le processus de masquage, de mélange de la base et du vernis, et de réglage de l'appareil de peinture. Il explique également comment appliquer ces couches sur le pare-chocs. Après avoir réparé des éraflures profondes et des marques d'usure, il partage des astuces pour éviter les surjets et assurer une finition uniforme. Le but est d'obtenir un résultat professionnel sans avoir à faire de lissage ou de polissage excessifs.
Takeaways
- 🛠️ L'épisode du tutoriel vidéo traite de la réparation et de la peinture d'une coque de pare-chocs en plastique.
- 🎨 L'auteur montre comment masquer la zone à repeindre, mélanger la base et le vernis, régler l'appareil à peinture et appliquer les couches de base et de vernis.
- 🔍 Il est recommandé de regarder la première partie de la série pour comprendre la réparation des éraflures et des marques de frottement sur la coque de pare-chocs.
- 📝 L'étape de masquage est cruciale pour éviter les débordements de peinture sur les panneaux adjacents.
- 🏷️ Trouver le code de peinture de la voiture est essentiel et peut être trouvé à différents endroits selon la marque et le modèle.
- 🛒 Il est conseillé d'acheter la peinture, le réducteur et d'autres fournitures auprès d'un magasin d'approvisionnement automobile ou de Napa.
- 🧪 La mélange des couleurs de base et de réducteur suit un rapport de 1 à 1, et il est important de bien mélanger le tout avant d'utiliser l'appareil à peinture.
- 🔧 L'ajustement de la pression de l'appareil à peinture est crucial pour une application uniforme et éviter les taches de peinture.
- 🧽 L'utilisation d'un linge à pousser (tack cloth) permet d'éliminer la poussière avant la peinture et entre les couches.
- 🔄 L'auteur insiste sur l'importance de l'overlap de 50% lors de l'application des couches de peinture pour assurer une couverture uniforme.
- 🛑 Une erreur lors de l'application du vernis a conduit à des coulées, nécessitant un ajustement de la pression et une application plus rapide pour éviter de futures erreurs.
- ⏱️ Une attente appropriée entre les couches de vernis et une séchade complète sont nécessaires avant de retirer le masquage et de procéder à l'aplatissement des irrégularités.
Q & A
Quel est l'objectif principal de cette vidéo?
-L'objectif principal de cette vidéo est de montrer comment masquer, mélanger et appliquer une couche de base et une couche de finition sur un pare-chocs en plastique.
Pourquoi est-il important de bien masquer la zone de réparation?
-Il est important de bien masquer la zone de réparation pour éviter les projections de peinture sur les autres panneaux du véhicule, ce qui pourrait nuire à l'apparence finale.
Où peut-on trouver le code de peinture de son véhicule?
-Le code de peinture de votre véhicule peut se trouver à différents endroits selon la marque et le modèle, souvent sur une étiquette à l'intérieur de la boîte à gants, sur les montants de porte ou, dans ce cas, sur une étiquette à l'intérieur du coffre à roue de secours.
Quel est le ratio de mélange pour la couche de base et le diluant?
-Le ratio de mélange pour la couche de base et le diluant est de 1 pour 1, c'est-à-dire une partie de couche de base pour une partie égale de diluant.
Quel type de pistolet à peinture est utilisé dans cette vidéo?
-Le type de pistolet à peinture utilisé dans cette vidéo est un pistolet à peinture à haut volume et basse pression (HVLP) de chez Harbor Freight.
À quelle pression doit-on régler le pistolet pour appliquer la couche de base?
-Pour appliquer la couche de base, le pistolet doit être réglé à environ 25 PSI avec la gâchette ouverte.
Quelle est l'importance d'utiliser un chiffon de tack avant de peindre?
-L'utilisation d'un chiffon de tack avant de peindre est importante pour éliminer les particules de poussière qui pourraient être présentes sur le panneau, garantissant ainsi une finition plus propre et plus lisse.
Quel est le ratio de mélange pour la couche de finition (clear coat) et l'activateur?
-Le ratio de mélange pour la couche de finition (clear coat) et l'activateur est de 4 pour 1, c'est-à-dire quatre parts de couche de finition pour une part d'activateur.
Pourquoi a-t-il augmenté la pression du pistolet à peinture pour la couche de finition?
-Il a augmenté la pression du pistolet à peinture pour la couche de finition à environ 29 PSI car une pression trop basse peut entraîner des coulures, comme il l'a constaté après la première application.
Que faut-il faire après avoir appliqué la dernière couche de finition?
-Après avoir appliqué la dernière couche de finition, il faut attendre environ 2 heures pour que la peinture sèche, retirer soigneusement le ruban et le papier de masquage, puis laisser le panneau sécher au soleil pendant environ 24 heures avant de poncer et polir les coulures éventuelles.
Outlines
🛠️ Réparation et peinture du pare-chocs en plastique
Dans le deuxième épisode de la série vidéo, l'animateur explique comment masquer et préparer un pare-chocs en plastique pour la peinture. Il insiste sur l'importance de la bonne application du ruban adhésif pour éviter les surimpressions, puis détaille le processus de recherche du code de peinture de la voiture, l'achat des produits nécessaires comme le base coat et le clear coat, et la préparation de l'appareil d'aspiration. Il recommande également de regarder l'épisode précédent pour comprendre la réparation des éraflures et des marques d'usure sur le pare-chocs.
🎨 Préparation et application du base coat
L'animateur montre comment mélanger le base coat avec du réducteur en suivant le ratio 1 à 1, puis comment régler la pression de l'appareil d'aspiration pour l'appliquer correctement. Il insiste sur la technique de pinçage pour éviter les blobs de peinture et la nécessité de bien nettoyer la surface avant de peindre, en utilisant un désenfectant à graisse et un tacle pour éliminer la poussière. Il décrit ensuite le processus d'application du base coat en plusieurs couches, en veillant à bien le fondre dans le reste du pare-chocs.
🚫 Problèmes et solutions lors de l'application du clear coat
Dans cette partie, l'animateur relate les difficultés rencontrées lors de l'application du clear coat, notamment l'apparition de runs dues à une pression insuffisante et un excès de peinture. Il explique comment ajuster la pression de l'appareil pour éviter ces problèmes et comment procéder après l'application de chaque couche, en utilisant un tacle pour nettoyer la surface sans perturber la couche de peinture fraîchement appliquée. Il met également en évidence l'importance de laisser sécher le clear coat avant de retirer le masquage et de procéder à l'étamage pour éliminer les runs.
Mindmap
Keywords
💡Masquage
💡Code de peinture
💡Diluant
💡Mélange de peinture
💡Pistolet à peinture
💡Démaquillage
💡Éponge à poussière
💡Application de la peinture
💡Couvre-lumière
💡Couche finale
💡Vernis
Highlights
Introduction to the second episode of a DIY video series on repairing and painting a plastic bumper cover.
Explanation of the importance of proper taping and masking to avoid overspray on adjacent panels.
Use of plastic covers from Home Depot or Walmart for comprehensive car protection during painting.
Locating the paint code for a car, which can vary by make and model, often found on stickers inside the vehicle.
Purchasing the correct paint and reducer from an auto body supply store or Napa for a precise color match.
Demonstration of the paint and reducer mixing process, emphasizing the 1:1 ratio for base coat and reducer.
Setting up the paint gun with the correct pressure for even application, using a Harbor Freight high volume low pressure air gun.
Thorough cleaning of the panel with grease and wax remover before painting, with a note on drying times for primer spots.
Use of a tack cloth to remove dust particles from the panel before spraying.
Technique for spraying paint with 50% overlap and the importance of movement before triggering the spray gun.
The process of waiting 15 minutes between coats and using a tack cloth to prepare the surface for the next coat.
Tips on blending the paint into the rest of the bumper for a seamless finish.
Mistake made during the clear coat application, resulting in runs and the decision to address it after the paint dries.
The revelation that increasing the pressure on the spray gun can help avoid runs in the clear coat application.
Final application of the clear coat and the need to allow it to dry for 2 hours before removing tape and masking.
Advice on leaving the repaired area under the sun for 24 hours before sanding down any imperfections.
Conclusion of the video with a reminder to subscribe for the follow-up on addressing the clear coat runs.
Transcripts
hey what's up there dear sers welcome to
the second episode of my video studos on
how to repair and paint your plastic
bumper cover and in this episode I'm
going to show you how you can mask off
and then uh how to mix both your base
coat and clear coat and set up your gun
and then apply uh both of both base coat
and clear coat to your plastic bumper
cover and if you haven't already seen
the first episode where I repair some uh
deep scratches and scuff marks on this
plastic bumper cover I suggest you do uh
I'll put a link to that video and the
little new interactive video links
YouTube have guys all right let's get
started on uh taping and masking our
repair panel and this is an important
step which usually a lot of times gets
overlooked and if you don't tape things
up correctly then oh you're going to
have overspray all over your other
panels which uh you weren't planning on
painting and it's not going to look good
so take your time be patient and uh you
know you know make sure you get the tape
in between the panels the the panel
that's being painted and the adjacent
panel just try to guess the edge try to
like get in between like your headlight
and the panel and then tape
up I like to use these plastic covers
that they sell at Home Depot and also
you can get them at Walmart for pretty
cheap uh they cover the entire car that
way you have nothing to worry about all
right next is time to find our paint
code and our uh the your paint code is
look at in different locations based on
your cars making Model A lot of times
it's on a sticker inside your glove box
lot of times it's on your door jams or
in our case here for this Audi it's it
was on a sticker inside of our spare
tire ball next you want to take your
paintco to your local auto body shop
supply store or Napa some napas they do
they do paint also and actually this is
where I got this from I got half a pint
for about 19 bucks uh and this is plenty
for what we're doing here next you also
need some reducer and you got to be MI
mixing this with your base coat and
reducer is pretty cheap I think for
about 10 or 12 bucks you should be able
to get a quart at Napa also also these
mixing cups are great as well they have
these little graphs on them that help
you uh mix your paint and clear coat
accurately all right next we're going to
be mixing our paint and uh we're going
to our mixing ratio for base cat and
reducer is 1 to one which means for one
equal part of uh for one part of Bas Co
we put one equal part of reducer and I'm
going to go up to go up to two that's
actually going to be plenty for the
touch-up we're doing actually no I'll go
up to three just to be on the safe side
so I don't have to mix again so if I'm
going up to here which means on the
first part of this graph if I'm going up
to three to to add equal amount I go to
the same number on the second part which
is up to here so next we shake our
can and right
there and now we add
reducer
there we go it should do it and next
we'll stir him and mix him thoroughly
but before we put our paint in our paint
gun we're going to set our pressure on
this gun uh this is a harbor freight
high volume low pressure air gun and if
I remember correctly the last time I
used it I uh used 25 psi with the
trigger open so first we make sure our
regulator is closed all the way next we
connect our
Airline and then we start slowly opening
this up to get to about a 50 and then
we're going to try it with the
trigger nope it's way too low keep going
60 that's too high bring it down a
little
bit almost
there looks about 25 to me next we're
going to put a strainer on top of our
fluid cup and then we'll pour our pain
in all righty next we're going to clean
our panel thoroughly with grease GRE and
wax remover keep in mind if you you
don't have to go over these primer spots
with our grease and wax remover but if
you do then you're going to have to wait
longer for it to dry uh probably a good
3 to 5 hours would be
sufficient and last step before we start
spraying is to get a tack cloth and Tack
down our panel and this will get rid of
all dust particles that could be on our
panel
still
and the way I'm going to spray this is
that I'm going to treat these two repair
areas this area that I showed you in the
first uh episode and that area right
there I'm going to treat them as one
giant area one repair area and I'm going
to spray starting from here to the end
of that area the repair area and then
I'm going to do two or three coats and
uh after it covers our primary areas
then I'll start blending that end of
that area that area into the rest of the
bumper and then just this little bit
there's there's no really blending I'll
probably have to go to that uh quarter
panel anyway but I blended it into the
rest of the bumper on this side all
right couple pointers before I start
shooting you want to make sure you spray
these with 50% overlap which means like
if you were covering this much with your
your fan area was this much you just
want to move down 50% and do your second
run also you don't want to point the gun
press the finger press the trigger and
then move you want to move first then
press the trigger cuz other otherwise
you'll end up leaving a blob of paint in
one spot and it won't be even with the
rest of the the area so first start
moving then you press the trigger and at
the end of the run you let off the
trigger then move down start moving
press the trigger again it's going to
happen kind of fast but you guys get the
idea I
think yeah I changed my mind I don't
think it matters in the F first quote I
just put on on the spots where I have
the primer it'll help cover the primer
areas faster next we're going to wait 15
minutes and then we're going to use our
tack cloth to tack down our panel again
all right let's T it
down and you don't have to go hard on
this you know you can just just uh do
this
gently and we tack it down again and
from this coat on I'm going to start
from this end of the area and then going
to go all the way across so I have a
matching pattern from this this side to
here and then uh and I'll slowly slowly
start to go further and further so I
blend this in to the rest of the
panel
all right and here's how things look
after our final pass you guys going to
have a hard time seeing anything in
detail but uh yeah just towards here it
just started to slowly go out and at the
end just SP a couple of passes this way
just to be really light on this side and
as we got closer to the repair areas
obviously we have more paint there but
this is basically how you blend uh
either repair areas or panels into each
other and here's a look at a repair area
I still haven't dusted this uh panel
down yet after our final pass but uh
yeah it looks pretty good and now we're
going to have to wait about an hour or
two 2 hours for this to completely dry
and then we're going to start applying
our clear coat and I guess while we wait
this is a good time to start cleaning
our gun all right next it's time to mix
our clear coat and start spraying it and
I'd like to introduce you guys to my new
best friend which is this uh clear coat
that I got from Napa and this is my best
friend because after I spray this uh I
hardly have to do any kind of wet
sanding and buffing for the clear coat
to look good and if you're wondering for
one qu of uh this clear coat and the
activator at uh Napa I paid about 37
bucks if I remember correctly and this
clear coat mixes 4 to one which is uh
four parts of the clear to one part of
the
activator so there's our clear coat so
next we have one part of activator so we
just bring it up to
here and there's our activator next
we'll Stir It and next we put in our gun
and again we're going to use a strainer
and again make sure you thoroughly clean
this gun and if you're wondering how you
can uh clean your high volume low
pressure air gun I'll put a link to a
video I did again if you haven't seen it
which was uh I did about a couple days
ago I'll put a link to it in the again
in the interactive video links that
should be on your screen somehow and
next we tacked down our panel one last
time with our tack cloth and also should
go without saying after you spray your
first coat of uh clear coat you don't do
anything with this you don't tack it
down anymore
okay all right so I forgot to turn on
the camera when I did this but for clear
coat if I remember correctly the last
time I sprayed with this gun I ended up
uh turning up the pressure to about 29
PSI with the trigger pull so make sure
you do that obviously you don't have to
do that with the without the clear coat
and the gun otherwise I just think the
pressure with the clear cat in there and
spitting out of your gun uh it's going
to be somewhat difficult and messy and
the way up apply clear coat is basically
I start up top and then I go across and
again it's going to be with 50% overlap
and I'm going to apply three coats and
we're going to wait about 15 minutes
between each
cup
boom we got to run Houston we have a
problem God damn it we got to run uh I
made a double pass in this area right
here by mistake and and I think that's
why we got to run and I'm also putting
these wet these coats kind of wet yeah
what I'm basically going to do is just
uh finish up just I'm going to continue
I'm just not going to put any clear
coats on in this area or this I'm going
to put it really really really uh dry
and make really quick passes and then uh
we'll get those uh runs out when
everything is all dried up all right you
know what I'm going to bump the pressure
a little bit I'm going to have to kind
of do this blind but uh I think uh maybe
our pressure wasn't high enough that's
good be another reason why we got
runs all right so now we're going to put
on our final code and I'm I'm going to
have no choice but to go over these
areas where we got the runs because just
because we need some clear coat uh
around those runs cuz we're going to end
up sanding Those runs down and there's
no clear coats there's not enough clear
coats around them then we're going to S
through I'm just going to go a little
bit faster though but uh yeah after this
SC we should be done all
right
and here's how things look after our uh
Third Run and uh it's a little orange
peely you know the first coat I was
putting on there it came out really nice
it was nice and uh you know mirror the
mirror finish you would wish for but I
guess it's because our pressure was too
low and when I increase the pressure to
be on the safe side cuz they don't want
get any more runs it ended up being a
little bit more orange peely but uh
that's the balance you're just going to
have to find out I guess based on
different uh guns you're going to use
and uh the clear coats but for this
clear coat then now we find out that we
need to raise the pressure at least uh
uh to close to 30 PSI so what we're
going to do next is to just let this sit
for about 2 hours then I'm going to
carefully uh pull off the tape and the
masking paper around our panel then I'll
put it outside and let it sit under the
sun for about 24 hours before I attempt
to
uh sand down this uh these runs and get
them out and here's a close-up of our
repair area and minus these guys it
looks pretty good we got uh no scratches
or scrapes showing uh we can't tell that
there was Primer applied to this spot or
there was any repairs down to the spot
and with that said going to wrap this
video up uh if you want to see how I get
these runs out please consider
subscribing also when the video is up
and ready I'll put a link to it in the
again in the interactive video links
YouTube has so uh you can access that by
just clicking on the icon that should be
on your screen all right so again if you
like this video please give it a thumbs
up and I'll see you next time thanks for
watching
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