That's what I'd do... but when it comes time to weld you'll just have to sand/grind off the POR-15. It will also burn off as you weld. Then just re-apply over the top of the weld.

POR-15 on every body surface that doesn't get paint is a good rule of thumb.

Lee


-----------
1965 Chevy C-10 Gallery page
My Chevy truck pages more info and pictures!
1961 Studebaker Hawk
1962 Shasta 16' AirFlyte Travel Trailer
1941 Case Model S tractor