I heard an interesting story about por15.
My father in law is into kit cars and at one of the shows he was at there was a stand for this stuff and demos. Anyway someone came up to the stand asking how to remove the stuff from skin. The answer was "you cant you have to wait a few weeks till that skin comes off naturally as it does" The guy looked a little sheepish at this stage. Turns out he had been wearing the gloves etc while applying it but had needed to go to the toilet and hadnt removed the gloves first.