I have used DOT 3 fluid (Brake) to remove Factory (Athearn) paint from plastic HO Scale Model Railroad Locomotives with minimal damage to the fine detail on the plastic. I NEVER thought about how that could translate to Automotive restorations.
as a side note, I have a buddie with a Y2 1967 4K that has been off the road since It put me in the hospital (Mary Bridge Burn Center - Tacoma wash in 85') His car is like a time capsule stuck in the 80's. anyway I ramble.
Try a small sample area with the DOT3, anyone else tried this?