It was good for lots of things, yeah. Took rust right off iron and steel, opened drains, removed paint, all sorts of things. Sort of stuff you can't get any more. Sam's granddaddy was caught by some federal cops, and we couldn't getit anymore. Not that he quit makin' it, but the feds were buying it all up and using it to fuel up Saturn V's and things like that. Sam was always right proud of the part his family played in the Apollo 11 space flight.