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Thread: Painting Plastic - Best Practices

  1. #1
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    Painting Plastic - Best Practices

    I want to change the interior color of my German truck from mid blue to grey.

    What are the best methods and products for doing this? Obviously cleaning the removed sections is important. What should I do to ensure a long lasting professional looking job? Thanks.

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    i would like to do the same. im scared of the paint layer cracking due to expansion/contraction from heat changes because the material is kind of soft almost rubbery

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    Variable Bitrate djvillar's Avatar
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    I did a civic a while back. It had a hard plastic interior. Clean everything with a degreaser, then sand everything with 200 or 300 sandpaper. Then paint. I used a matt dupont black. Everyone thought it was stock. Its held up fine for as long as i've had it, since 98. Got rid of it in 94 or 95.

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    Vendor - Qube colin's Avatar
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    Quote Originally Posted by djvillar View Post
    i've had it, since 98. Got rid of it in 94 or 95.
    Hahaha!

    But easy enough, clean it well (soap, degreasser, whatever) and then sand it with a decently high grit. Use good paint, that's all I can say. Paint intended for lightly sanded plastic. Krylon has a good line, "Fusion" I believe, which holds to plastic specifically.

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    Variable Bitrate djvillar's Avatar
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    Also spray extremely light coats and bake dry. If your cover the sub materials color on the second coat you're laying it on too thick. When I did it, i let it bake dry between coats and didn't get full coverage till the 4th coat.

    If you put it on thick it will especially without sanding first, you'll be able to scrape an edge up and peal it off in one piece like unupholstering a chair.

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    Variable Bitrate djvillar's Avatar
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    Quote Originally Posted by colin View Post
    Hahaha!

    But easy enough, clean it well (soap, degreasser, whatever) and then sand it with a decently high grit. Use good paint, that's all I can say. Paint intended for lightly sanded plastic. Krylon has a good line, "Fusion" I believe, which holds to plastic specifically.
    Sorry for the dyslexia... 94 or 95 that I got rid of in 2004.

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    Maximum Bitrate david69leonard's Avatar
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    You need to make sure that you clean the dash with alcohol, also use an adhesion promoter and primer
    I painted my whole interior 4 years ago and it hasnt chipped or faded, i used dupli-color vinyl and fabric coating at autozone, its good on dashes doors seats and carpet

    Also sanding the plastic bad idea, it will make the finished product look like ***, most plastic dash components are textured, unless you plan on spending all day making it smooth removing all the scuff marks from the sand paper, resorting to filler primer in the end, dont do it, lol

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    Variable Bitrate djvillar's Avatar
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    Sanding wont ruin the surface,.. if you use the right grade, 200 or 300. Of corse using a 40grit will leave the surface chewed up. But just like you sand paint bewteen coats, so do you sand to prep for paint. You're not look to shape the piece as it is already the a finished piece, but sand (fine grit) will give you better adhesion.

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    Maximum Bitrate david69leonard's Avatar
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    Quote Originally Posted by djvillar View Post
    Also spray extremely light coats and bake dry. If your cover the sub materials color on the second coat you're laying it on too thick. When I did it, i let it bake dry between coats and didn't get full coverage till the 4th coat.

    If you put it on thick it will especially without sanding first, you'll be able to scrape an edge up and peal it off in one piece like unupholstering a chair.
    What do you mean by "bake dry"? Putting plastic in the oven is also a bad idea, lol

  10. #10
    Variable Bitrate djvillar's Avatar
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    Quote Originally Posted by david69leonard View Post
    What do you mean by "bake dry"? Putting plastic in the oven is also a bad idea, lol
    Heat lamp dude. Getting the solvents out of the paint to speed curing and minimize the effect of shrinkage leading to cracks with multiple coats...

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