welcome to the club
Me too. My rear bumper will probably rival yours in beauty if I give it another winter!
post some "after" pics....my whole under carriage has surface rust too...the salt in PA sux as well...I'm interested to see how the Por15 works.
POR15 is great stuff - the key is the prep though.
I am planning on doing the same thing. Por-15 has a cleaner (Marine Clean) and Prep (Metal Ready) they say you should use before you apply it.
They say that Por-15 best adhears to rust, so is it better to just apply it over the rust, or should you use a wire brush first?
Also, Por-15 as UV sensitive, but since it is the frame, I don't think there is anything to worry about. Just to be safe though, I am going to use their CHASSISCOAT BLACK top coat over the Por-15.