[masraum]

Originally Posted by gduke2010

Thanks Steve, I have think your right about the grit. You think cleaning down to bare metal, then maybe good primer to kill the rust and spray bed liner between topper and side of bed? Sounds like a good idea. Hope to do before the weather gets too bad.

If you don't grind to shiny metal or apply a chemical to convert the rust to something that's not rust, the rust will come back. If you wire brush the rust until it's smooth, but still not shiny, then you're going to have problems again.

My experience is that a wire brush won't fix rust.