Sun Feb 26, 2006 1:35 am
Okay, this probably sounds like a hack solution, but it works. I used to use black shoe polish on the dash of my '72 2002. I had the same "not quite black" appearance even after it was thouroughly cleaned. The shoe polish, massaged-in with a brush did wonders to turn the dash to a rich matte black again. Lasted for years.
I've never tried this only my E30, but the idea is the same. If you're E30 dash is like mine, it's not actually black, but rather a dark grey (don't ask me why), so you'll need to use grey shoe polish. Also, make sure to remove any excess polish so it doesn't rub off every time you touch the dash.

-KDS in Vancouver ('88 325i Touring)