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How to paint plastic?

post #1 of 14
Thread Starter 
Well, what I mean is how would I go about on getting paint/primer to stick to plastic. With metal and such it's fairly simple; all you have to do is scuff up the surface, prime, and then paint. But getting primer to stick to plastic is a bit difficult. Is there a special primer I'm suppose to use?
post #2 of 14
Quote:
Originally Posted by bombzaway View Post

Well, what I mean is how would I go about on getting paint/primer to stick to plastic. With metal and such it's fairly simple; all you have to do is scuff up the surface, prime, and then paint. But getting primer to stick to plastic is a bit difficult. Is there a special primer I'm suppose to use?

there are certain kind of paint that are made to be applied on metals, and there are for cement, there are for plastic, etc.
what kind of paint are you using? latex? enamel? acrylic? epoxy?
Edited by ghostrider85 - 5/3/12 at 2:23am
post #3 of 14
Krylon make a paint for plastic here , though it can be hard to find in some counties, I have also used rust guard which is an epoxy enamel and it has worked ok though it takes around 48 hours to fully dry.

You can also scuff up the plastic with a fine grade sand paper to help it adhere better
Edited by Krahe - 5/3/12 at 2:36am
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post #4 of 14
Quote:
Originally Posted by Krahe View Post

You can also scuff up the plastic with a fine grade sand paper to help it adhere better

I would highly recomend sanding the plastic with high grit sandpaper. Although Krylon says you can just spray it, you will most likely get unevenness and bubbles.

Oo an don't forget to "clean" it after you sand it to remove all the dust.
    
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post #5 of 14

sand with 600-800 grit sand paper.

apply epoxy primer in a spray can.(4 light coats+one comparatively thick coat.check youtube for videos on this.)

sand this with 600-800 grit sand paper.

paint the colour of your choice(same method.4 light coats+one thick coat.)

for a more reflective finish,use clear lacquer epoxy.

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post #6 of 14
As these guy's had said A light sand just enough to take off the shiny surface. And a couple of light coats of this. You can buy this stuff in a spray can. I was a painter for 14 years and this stuff will stick to everything smile.gif.
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post #7 of 14
Thread Starter 
Will that primer adhere to plastic, though? I have a krylon primer spray can and as I was reading the directions, it does not mention that it can be used on plastics. Do they even make a rattle can primer that can adhere to plastics? I asked the guy at wal-mart, but he had no idea what I was talking about..
post #8 of 14
Bin primer will stick to anything. You can pick it up at any paint store or most hardware stores. Just do a light sand and it will work just fine.
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post #9 of 14
It seems like everyone thinks the plastic should be treated differently then metal. Personally I would use same practice as metal.
Cases get very little handling when finished and plastic parts are hard with very little flex unlike lets say a car bumper.

I would recommend a non-sanding primer sealer or just use a light coat of what you have, just be sure you give it a light sanding before paint.
#1 make sure it is very clean to remove any mold release agents.

Glad to give further help if you need it.

Don't over think the paint process. Clean>Sand>Paint>Assemble
    
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post #10 of 14
Quote:
Originally Posted by bombzaway View Post

Well, what I mean is how would I go about on getting paint/primer to stick to plastic. With metal and such it's fairly simple; all you have to do is scuff up the surface, prime, and then paint. But getting primer to stick to plastic is a bit difficult. Is there a special primer I'm suppose to use?

there are plastic primer paints, too. some of the metal paints can disolve the plastic with the amount of
distillates. using a simple primer-filler is plastic friendly. the sanding gives the smooth plastic surface
a "bite" to hold to the plastic with. plus some plastic paints have a flex additive to allow the paint to
twist and bend without lifting or peeling.

FannBlade, on that note. i've given up on rattle can paints as they are not consistant, the nozzle splatters
and clogs. i've used an air brush for years, but on the side panels the fan on my brush is only two-inches
and painting candies and metallics streaks badly, do you have a better solution to use on wide-open surfaces?
my brush tip is.3 are there larger needle and tips made for large surface painting without bad blend lines?

airdeano
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