Painting Inside Tub- POR15 or Not?

[stokers]

I have just about finished scuffing up the interior floor and inside bed walls so that I can repaint. Interior is rust free but should I still use POR15? The inside is still mostly covered in original paint'/primer with bare metal showing in a few areas. I wasn't sure if the POR15 is necessary if you are mostly covering old paint. I also plan to put carpet inside once painted so the only part that will show are the interior bed walls. If not POR15 then what would you suggest?

Thanks

 

[allenfahey]

POR doesn't stick to paint to well. It's best to use the POR on any rust spots, let it dry. The bare metal spots I would feather out then use an epoxy primer or etch followed by a 2K HS primer. Sand the whole interior if the paint is in good condition with 320, sealer, paint, then clear. No need to sand again after spraying the sealer. Just let it flash off between coats.

 

[Rustytruck]

For me I am tired of all the dirt and the possibility of trapped water rusting out the body so I am planning to sand the bed and treat all bare metal. I have no rust issues so I am going to dig out all the old seam sealer and reseal and add extra where it makes sence then epoxy seal and use bedliner material on top. I would do the same even if I were to carpet. My end goal is to be able to hose it out after running around in the desert dust.

 

[Dave]

Paint Over Rust! I know there are guys that swear by it and would butter their bread with it if it were not toxic and sticks to skin like Great Stuff. If its clean metal, I'd use a good etching primer followed by an epoxy sealer/primer then an epoxy single stage paint. 2x on what allen said!

 

[allenfahey]

Paint Over Rust! I know there are guys that swear by it and would butter their bread with it if it were not toxic and sticks to skin like Great Stuff. If its clean metal, I'd use a good etching primer followed by an epoxy sealer/primer then an epoxy single stage paint. 2x on what allen said!

Your right exept you should NOT use epoxy overtop of etching. If you use etch use regular 2K HS primer (2K primer has a hardner in it and HS stands for high solids) That's what I've been told about etch and epoxy in a few paint classes and a recent ICAR class.

 

[Dave]

Your right exept you should NOT use epoxy overtop of etching. If you use etch use regular 2K HS primer (2K primer has a hardner in it and HS stands for high solids) That's what I've been told about etch and epoxy in a few paint classes and a recent ICAR class.

I used a system from Matrix that had a very light etch coat (translucent green with hardner) followed by an epoxy primer/sealer right from their application data over bare (media blasted) metal. about 30 minutes between coats or you had to scuff sand.

 

[blankenship76]

I would just use Raptor liner, the whole kit with the spray gun is right at $110, it will adhere good, and ensure your inside stays rust proof. Or just go with some rustoleum primer and then coat in your choice of rustoleum metal paint, they are built to prevent and seal rust. You could do the interior for under $50.

I just fiished doing the entire underside of my bronco axles, frame, tub, and all in POR15 the prep sucked and as some said it didn't adhere great everywhere, I had to go back a few times. Also that stuff is a mess to deal with.

 

[Mikekerney]

Has anyone tried the Rust Bullet product that's advertised on this site?

 

[OlHorse]

I used Herculiner on the whole inside of my Bronco and have been very pleased with the results. It is a do it yourself roll-on kit product that you can pick up at most autoparts stores for less than $100. It has a non-skid texture similar to spray-in bed liners. The base of the product seems to be a polymer similar to POR 15. It looks great, is very durable, and cheap.

I also did my bumpers and wheel wells and it has held up great! Calls for 2 coats but 3 is best.