I just tried this new product brought out by Premier Films in California{no affiliation, blah blah blah} called PF1-TTR. TTR stands for tire,tar,rubber. It works great. Hardly any rubbing compared to Plexus. Takes rubber streaks from the track right off. Needless to say, I'll be using this stuff from now on. It's not up on their website yet so you will have to request it. Premier Films has a very good reputation for film installs on the west coast.

Premier Films 510-623-1308