Blown Motor - On the Radio and Heater Control back ground I used SEM Trim Black. Wrinkle Finish where needed on the sides was VHT High Temp Wrinkle Plus. I had no idea what really was correct, so I bought three different paints and did samples on some scrap plastic. I picked the paint and technique that seemed closest to what I had. I also let it be a little more aggressively textured, figuring that 40+ years of wear had worn down the originals.
I used some old computer case pieces as scrap, as these seemed similar to the same type of plastic.
I would recommend painting all the parts that need this finish at the same time. I found, at least for me, that there was a big difference in how the "wrinkle or texture" formed given temperature and humidity. Drying the parts in direct sun appeared to make a tighter texture. Letting the parts dry in a shaded area seemed to develop a larger texture pattern. It is something you'll need to play with.
The Rustoleum Fine Texture was used on my steering column, glove box door, ash tray and exposed dash frame. I was happy with it there.
