Por-15 on roof

If you have pretty good surface rust, it is best to treat it with something. Not a remover, but some sort of converter. When you're standing there looking at sparkly clean metal, if it had heavy surface rust on it, it probably isn't near as sparkly clean as you think. Unless you do apply some sort of treatment, you're just basically slowing the rust down. You can kill it, but it takes the right stuff to do it. That's my worry right now working on Vixen's outer wheelhouse and quarter, that I won't get it all. Well....that and the fact that I don't know jack chit about what I'm doing with the metal work. lol