I have used soda blasting before to clean old carburettors and the like, which is brilliant because not only does it clean them, but you can simply flush all the soda away without worrying about bits of grit getting everywhere for years to come.
Just another point about the rust eater, I think there are two types, one which actually 'eats' the rust, leaving you with bare steel, and another type called rust converter or something, which doesn't get rid of the rust, but turns it into some black stuff that can be painted over. I think the things containing phosphoric acid are actually rust converters?
Or am I imagining all this?
