i have some rust spots on the bottom of my tailgate again and last year i colormatched it but now im tired of my truck so i want to just put black on it...

i know por15 is great for rust but will it hold up on the paint. I noticed in the one thread someone saying that por15 needs to be put on rust but i find that hard to believe...

so before i go out and get it will it stick to bare steel just fine or should i grind it down, coat it in salt for a week and then paint it?

 

check out POR-15 website it has all the info you will need. POR15, Inc. - Stop Rust Permanently - Repair Gas & Fuel Tanks

 

ive read the site before and seen dozens of people use it on the site... but all the ones i remember painted right over all rust like the product is supposed to be used. havent seen anyone go right over paint

 

Im not sure about the paint either but i would say your best bet would be to grind it down to bare metal and use their bare metal chemicals.