Hello all,
I know this is an old thread, but I just did all the knobs, switches and vents and shrouds on my 3200GT. A real pain, but should have done them a lot earlier!
This thread, gave me the inspiration to tackle it myself. I found that "Goof Off" worked the best for me. I also used "Goo Gone" in the more sensitive spots(like where the symbols and decals on the switches were).
I removed all the parts (about 25 of them), with the exception of the 2 centre front vents). It took about 12 hours to complete over a one week period.............looks heaps better and now useable without getting black smudges over fingers,clothes and leather interior!
Just as a warning..........be careful if trying to remove the a/c control dials from the instrument cluster. If trying to pry them off from the front, you will most likely break the plastic tabs holding them onto the base unit, and maybe loose the tiny spring inside the dial. I broke 2 tabs and had to glue them back in place. It's best to remove the whole instrument cluster from the centre console, then remove the individual buttons/dials from the rear of the control units.