P. O. R. is great stuff. I put a new rubber floor in a heavy used cattle about 15 years ago. We took the old floor out and used the P. O. R. on all of the metal. Needles to say, it was already rusty, so we did it the way they said. Today, everything is about to fall off but the floor runners and up the sides where we painted is still good with most of the paint still there. It never gets cleaned, we left a crack between each board and that is it.