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E34 (1989 - 1995)

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  #1  
Old 01-11-2013, 02:43 AM
Bugsie Bugsie is offline
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Mein Auto: BMW E34 M50 2.5
How to paint black plastic grilles?

Hi all.

I decided to paint the plastic grilles below the wipers and on the front. But I have a doubt on how to apply the paint.

I already have the sandpaper (800 and 400) and a Scotch Brite pad to smooth, clean and degrease.

On a visit to the BX to look for the cans, I found the primer and the paint that I want (Krylon, for what it worth). While talking to the guy, he told me that if I don’t apply something on top of the paint, eventually it will peel out.

What can I do for the finish? I also found a gloss supposedly to apply on the end.

Any tips/advices on this is pretty much welcome.

Best regards
Fernando
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  #2  
Old 01-11-2013, 06:19 AM
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TemporarySanity TemporarySanity is offline
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For what it's worth, the Krylon wont match very well unless you are planning on a contrasting color. Either way, you should start with Bulldog plastic primer or something similar. It aids in paint adhesion to plastic. As for a top coat, it should be UV resistant so it doesn't break down in the sun. Automotive paint already has it in it. Surface prep is also critical for good adhesion. Good luck and post pics when done.
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Old 01-11-2013, 07:36 AM
Bugsie Bugsie is offline
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Mein Auto: BMW E34 M50 2.5
Hi.

I intend to DIY this and i'll go for spray cans.

For the procedure, I'll sanding then wash the parts. Aplly the primer and light sanding (2 layers). Then the paint (3 layers). As far as the colours, you´re right. I'll use a different black (satin).

Paint brand related, I mentioned Krylon because it's the one available on BX.

According to the primer, thanks for reminding me that it as to be for plastic. The one that I have it's for metal.

Thanks so much for the reply

Best regards
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Old 01-11-2013, 07:45 AM
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Monsignor Monsignor is offline
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Mein Auto: M50 Big Body
When i painted the faded hood vents of my e28, I lightly sanded (400 grit - 800 grit) then used a self-etching primer. Then i used a rattle-can that was made for vehicle trim. It was literally called trim paint. two coats of that and it was done.
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