POR-15 Prep Question

[Carl'sMJ]

Here's a question for you guys with some POR-15 experience...

 

Well, I've got my floors torn out of the cab now, but before I weld in the new pans I wanted to POR-15 the inside of the frame rails. There was a fair amount of rust on the inside of the frame and I spent some time today knocking/wire brushing the loose rust off... How carried away should I get with prepping the surface before painting the POR on? I've got the Marine Clean and Metal Prep from POR too.

 

I've been looking at the instructions from POR-15 and it seems that in order to get good adhesion it is actually preferable to paint the POR-15 on rust rather than smooth metal and I kind of figured that just knocking the loose stuff off should be good enough... I was just curious how much prep you guys did before painting and what the results were.

 

Also, Did anyone topcoat the POR inside the frame rails? I didn't see any reason too, but I was just curious.

[88pioneer]

Just did my floors on wednesday. Only had minimal surface rust, but painted right over it. The parts that still had factory paint i scuffed up. Should be good to go just knocking the loose stuff off

:cheers:

[1987Comanche]

I did my floors about a year ago and the only prep was to break off the loose rust and make sure everything was clean and dry. The only problem I had was a bit of peeling where the POR 15 pooled (the same channels where the water pools) but 95% of it was fine. What I've learned with POR-15 is the thinner the coat the better.