Welding Tips and Tricks • View topic Paint over mill ...
Apr 18, 2014· Even the best paint job will never be perfect, especially in a high moisture area like a spa surround. Removing the mill scale isnt the really a drama, more adding a little more protection. The way to do this with paint is with a zinc rich primer, or cold gal, as we call it in Aus. And a rust protecting top coat like the kill rust system. Mick