I tore the most of the interior out of the truck today and I'd like to paint the floor with something rust-preventative. I was going to paint it with POR-15 and then with Herculiner...then I saw the prices on both of them. I'm going to use a textured paint one way or the other since I won't be putting carpet or anything in the back, but my question is will Herculiner suffocate rust like POR-15? That would save me the hassle of laying down a whole bunch of coats and the $100 for what essentially amounts to a gallon of tar. Any help would be appreciated.