Hey guys, my son just got a sweet deal on a pretty nice 74' cb750, (ill post some pics later), and the previous owner told us he tried coating the inside of the tank. He said it wasnt kream brand, but couldn't think of the name. Its all bubbled up and looks to be flaking off. Good thing for my son is I have an extra tank that looks brand new on the inside, but thought maybe this one could be saved. Is there something like mineral spirits or paint thinner that I can put in there and let soak? Time isnt really a factor since we have the spare tank, so it could soak for months if need be. If anybody has any ideas, or success removing that old sealer, i would appreciate hearing it. Thanks.