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Discussion Starter #1
I had recently painted some interior trim about a month ago. I can go out to my car now and scratch (and I have a bad habit of biting my nails) the paint practically right off. So I want to do it again.

I have the following:

- sand free adhesion promoter http://www.summitracing.com/parts/smm-38363
- plastic trim paint #1 http://www.summitracing.com/parts/smm-39143
- plastic trim paint #2 http://www.summitracing.com/parts/smm-15243

I tried trim paint #1 when #2 was scratching off (on a totally different item) and it still scratches off. I washed all pieces in hot water with a light scrub pad and Dawn dish soap. Allowed each piece to air dry outside and wiped them down with a lint-free cloth. Sprayed promoter on twice (allowed to dry after each pass) and then light coats of paint; again allowed to dry after each pass.

Other than a de-greaser or acetone wipe down after bathing, what else should have been done

- What would be the best way to repaint the plastic trim pieces that have been painted already?
- What can I do differently this time to get my trim to stop scratching off?
 

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Moved to the wash, detail & paint section, as more experts in paint work look in here.

Might check the interior mods sections as well for threads on interior painting as it gets discussed there as well.
 

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Discussion Starter #3
Moved to the wash, detail & paint section, as more experts in paint work look in here.

Might check the interior mods sections as well for threads on interior painting as it gets discussed there as well.
Thanks sailor. Was torn between the two threads. I obviously picked the wrong one!

I looked over the how-to's and read them. I read the two that were a prepare and paint double thread. He didn't use the same paint and I basically did the same method for preparation. I didn't sand the trim as I read doing so actually does the opposite of what you want. I've read different sources from a Google search from different car forums and they are all different with preparation and painting techniques.

In the end, I want this forum's input on the best way to prepare and paint focus trim with SEM paint.

Thank you all and thank you sailor for looking out!
 

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Taciturn. Your turn.
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Paint "how to 's" are all over the place. While I'm no expert, this is my experience...

Years ago I used some adhesion promoter for the first time on the side mirrors on another car I had, and on one HOT day in parked the shade the paint cracked up and I could scrape it off with my nail. I never used adhesion promoter again, in hindsight I think I used too much (more than one coat?) and not all plastics need it. Vid ->https://www.youtube.com/watch?v=jz4Lg4QYioQ

Three years ago I painted some interior stuff with SEM paint only, prep was scuff with 0000 steel wool, clean/degrease, wipe with a tack cloth, paint. I found that method at a custom stereo site.
 
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