I sent an email to the powder coater, to see what they have to say.
How much cleaning power does that leather product you have on sale provide? I have these funny brown spots on the back of my grey motorcycle saddle that don't seem to come off. Painter even wiped some turpentine or something like that, it just lightened them up a bit. Looks almost like a mold, but scratching (and sniffing
) doesn't do anything for them. I use H-D saddle soap on it every couple of months.