We use Naphtha (Naptha) for tire cleaning. It's the main ingredient in lighter fluid. Have not had a problem with it softening rubber. Seems to work just great and it's inexpensive at the hardware store. In addition, it does a great job on cleaning black marks off the lexan bodies. Evaporates with no residue.
Last edited by Matt Trimmings; 05-19-2016 at 09:29 PM.