I cleaned the piss outta this thing and tried some 3m oxidation remover and nothin TOUCHED it til I got some WD 40 on it by accident...then I tried a spot on purpose...then half the floor...
Sprayed it on fairly heavy....let it sit for a while, then scrub w/stiff bristle brush, then towel up...
It's been on there for a couple of days now and holding it's color pretty good...it was on a ACCIDENT!!...
I've tried it on some other areas as well...looks like more WD to come!!...