Dot Heton
XS650 Enthusiast
I have a gas tank that has an inch of black varnish on the bottom and a little rust, but not much. I'm thinking of using brake cleaner or similar to dissolve the varnish. I'm going to use phosphoric acid to clean the rust but since the tank has been parkerized in the past i'm wondering if the acid will remove the parkerizing. I just read 10 pages on cleaning rust from the tank and I'm leaning toward the phosphoric acid because it leaves a coating on the metal that prevents future rust. Anybody have any expirience with this?