Re: Cleaning pressure tank before soldering?

[r-c]

One type of repair is to screw in a small self tapping screw, with some sealer. The epoxy two tube stile works good, because of the small amount needed.
To clean for heat, I have found the so called "super purple’" type cleaners to do well. Gets rid of varnish and other scale. It can remove paint, mostly the spray can type, but will dull the finish of the original enamel baked on paint if not careful.