Fuel Fluke

i had a mach 1 that had sat for years/ stranded me on the way to show it off to my friends the tank was full of scale and varnish i took the tank out of the car and threw some lug nuts over in it and shook the hell out of it to break all the crap loose i then kept washing it in a parts cleaner till nothing else came out /poured a gallon of lacquer thinner in it to cut the varnish reinstalled and all was good!