tank out, best way to clean
during frame repair/paint, removed the H2O tank from my 72 globetrotter. appears to be in great shape, no leaks. while it resides safely in my garage during futher work, what would be the best way to clean this baby out? no debris inside, but through the 1.5 inch opening, I can see various "scums". I was thinking of filling with ice, rock salt, and some cold water, give a good shake to "scrub" it. then a good flush. any body have other suggestions would be appreciated.