[D.B]

I used it on the fuel tank of a 50cc Yamahopper that I use as a pit bike. I bought the bike at a swap meet, actually three of them. The previous owner stored in a shed for many years. The last time they were registered was in the late 1980's so the tanks were full of rust. I poured three bottles in the tank sloshed it around every 30 minutes or so for several hours. Then drained it back into the bottles. I then washed the tank out and now it is fine, no rust. Matter of fact I still have the bottles of Evaporust in my shop.