Bing, they have a tie-coat primer now that can be applied after the POR-15 has completely dried. Much more convenient than the old method of waiting until the right cure point to flash prime.
George, see the usage tips specifically addressing your issue- http://www.por15.com/POR-15-Usage-Tips_ep_63.html
Going have to get me some!-Kevin
I used to use xorust product, got bought out by rustoleum, wifey 03 windstar was rusting out in the interior bottom of the passenger door, put that stuff on, a couple of years ago, just looked rusty again, time for a new application. I think it slowed the rust but did not win the battle.
Thanks. Haven’t used the stuff in 10+ years. I’m sure the partial can I’ve got now is hard as a rock.