Long story short ... I'm using airplane stripper to strip the paint from my wheels. All went fine except for the rear tire on the brake side. It stripped the entire front wheel and the clutch (lever) side of the rear wheel (except for the center lip on both ... which I was already expecting) with no problem. So why would it not work on one particular side of the wheel? I've tried applying it 3 times already and letting it sit for at least 15min each time. What gives?