Re: Bicycle motor coloring?
It only affects the aluminum, and the longer you leave it on, the darker it gets up to a point. It doesn't hurt the aluiminum or eat it away at all, just darkens it. It does take a bit to get all the residue off, but nothing out of hand.
There is still some residue on the engine in the picture, but I didn't scrub it completely, just rinsed it so it would stop darkening.
It goes without saying- don't get any inside the ports.
Last edited by Bikeguy Joe; 07-26-2008 at 11:21 AM.