[chrisk]

Im currently trying to polish up a set of porsche Fuch wheels. I stripped the paint that was on with nitro moors paint striper and found a rough surface with some kind of greyish coat underneath (anodising?) anyways i put a few greasless wheels on it till i got a respectable finish and hit it with brown, thing is the surface came up all pimply and uneven. Went back to greasless in case it was like that and didnt notice due to scratching and brought it back up but same thing happens. What causes this? is this from gases in the alloy, or am i doing something wrong? high speeds? checked warmth of surface, dosnt seem like i made it too hot though.