Applying POR-15?

fastbacker · 05-13-2006, 10:53 AM

I recently purchased a gallon of por-15 along with their marine clean and metal prep products. I was told you can't put it a spayer because it will clog.

Does it leave brush stroke when applied with a brush?

Thanks-
Craig Backer

S2GART · S2GART's Garage

No, there are no brush strokes. However, you will never be able to use that brush again. POR-15 is permament. I once tried to at least soften a brush that I used by leaving it in diesel fuel for 3 days. NOTHING. This stuff will not come out. So, buy some cheap brushes. The only weakness that POR 15 has is sunlight. You will need to top coat it if the area you are painting will be exposed to light..

fastbacker · 05-13-2006, 11:26 AM

Top coat with what? Clear?

gestalt1 · 05-13-2006, 11:35 AM

use a durable black or what ever color you want - the topcoat just needs to protect the por-15 from the sunlight. also wear rubber gloves - the stuff really sticks to your skin and does not remove easily. the cheap foam brushes from the hardware store work well.

S2GART · S2GART's Garage

Yes, definetly wear gloves. Once this stuff dries on your hand, onlt time will get it off. You can scrub all you want, it will not come off, once it dires.

oneblueyedog · oneblueyedog's Garage

You can spray it. The archives has a thread that documents a whole 911 that was sprayed with it.

I used a foam fine finish roller for my engine bay.

KevinB · 05-13-2006, 12:56 PM

Another thing you should do if you top coat, is to spray the top coat before it is completely dry. just a little tacky will be fine. Once it sets up dry it is like porcelain and the topcoat will not stick to it very well.

Kevin B

JohnJL · 05-13-2006, 01:10 PM

Also, once you open that can, be VERY careful to wipe the lip before closing it back up. Don't paint from the gallon, pour out what you need into another container and work from that.

You should fold over a piece of saranwrap and put that over the top of the can before closing it so the top will separate from the can again.

I am not sure all paints will stick to POR. They have a series of specific topcoats. I'm not sure why you'd want to clearcoat it either. THe coating does not dry perfectly (bubbles, bits, color variations) no matter how you prepare and apply. Do while it is impervious to most everything you'll ever throw at it, it isnt a perfect cosmetic finish and a clear won't fix that.

Vintage914Racer · 05-13-2006, 04:23 PM

I applied it to my car and while the POR-15 itself stuck great after following their directions, the topcoat did not. I used what they recommended for topcoat and followed their cleaning and prep directions, but the topcoat simply bubbled up.

Evans, Marv · 05-13-2006, 06:57 PM

If it's not going to be exposed to sunlight, there is no need to topcoat it. You should be able to coat about a hundred cars with a gallon. When I store mine by putting plastic in as John says, I try to droop it down as far as I can to take up as much room in the can as I can. The stuff sets up by the moisture in the atmosphere. Also, after I open a can again, I pour a bit of MEK in & stir it around with a chopstick to thin it because the top layer will set up a little.