I recommend using a light wipe of mineral spirits before starting and fine sanding before and in between coats. You really want the paint to "bite" into the plastic. Then get a clear coat that will match your interior. Nothing looks tackier than having a high gloss finish when the rest of the interior is matte. Apply about 2 or 3 coats of paint and 2 coats of clear when you're done. Make sure you wipe any mineral spirits off before applying paint though. I did this same process to my car. I posted pics in my intro thread I do believe.
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