[rotorwrench]

I just use drano crystals and water to remove the thick layers of crud on old tanks. New ones are sometimes different. They used to terne plate the tanks inside and out to slow the deterioration by near a decade before it wears thin. I don't know if drakes supplier uses terne plating or not. All the older tanks of the early 50s & earlier just had a stand pipe for the fuel pickup inside there. If it has a screen, a person is stuck with it if you can't change it through the sender or filler bungs. I don't care for screens on there myself but what's a person to do about it?