Given the general quality and rust issues of the Tacoma frames of that vintage, I would be leery that it was 'just cosmetic'. Good luck with the POR 15.
Nope, it is cosmetic. surface rust , no penetration. While I was doing it the UPS guy came up and told me that if I decided to sell he would instantly buy it. He looked at the frame and said it was not an issue. When I first noticed it I contacted Toyota and they told me to bring it to the dealer for evaluation. It has gone thru a few evaluations since then and they have signed off on it not being an issue. (they were looking for it rusting thru the frame)
So far really easy to apply. looks great
