I needed to trim my fender lips to get a little extra clearance for the new wheel/tire combo. When I removed my wheel well trim I found some of the lip edges had bubbled, probably from all the rubbing on the old tires. While grinding down the lip a couple pieces broke off exposing bare metal. I think there is 2, both pretty small. No rust or anything on the exposed metal.
I stopped by a body shop today and asked some questions and they recommended doing the following
-- tape everything off
-- Spray U-POL Grey self etching primer onto the bare metal
http://www.amazon.com/U-POL-ACID-PRI...478102&sr=8-23
-- brush on base coat ( I have a small can the PO gave me)
-- prime exposed bare metal edges from grinding, and then cover with seam sealer to prevent any rust, moisture etc.
I just wanted to throw this out there and see if that sounds correct