Hey everyone Im new to the forum and new to harleys, my dad was a harley fanatic for his whole life and he left our lifes last summer. He left behind his 2000 Fatboy with around 3500 miles on it. It has been sitting around for the last 6 years with old gas in it. Found out the tank has a little rust in it and the tank liner is peeling off pretty good. I have tried getting alot of it out just with cleaners and gas and diesel, even tried some pea size rocks but didnt get too crazy with them. Iv been looking at the POR 15 tank cleaner but wondering if that is the way to go? Wondering if the acid is gonna do what I want. Thanks!!