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Question About POR 15

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KVH

KVH

Obi Wan
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If anyone here has used it on their TR frame, my question is whether I need to take off all the old black frame paint before applying POR 15.

The instructions say that previously painted surfaces can be a problem in some cases. I suppose paint remover and a wire brush would do.

Any views on this?
 
I've used it over other paint if I knew no rust lurked. Scuff the paint with sand paper or something to give it some 'tooth' as POR like rough surfaces better than smooth. I've painted anything/everything with POR and been pleased with the outcome. I even used the regular POR15 black as an engine block paint and it still looks great 4 years later. Never had a heat problem.
 
Hi,

Yes, I've used it, but only on completely bare metal that had been sandblasted. It can go over rust discoloration, but not over loose, flakey or powdery rust.

Don't get it on your skin, or anything else where you don't want it for that matter.

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Two things to keep in mind. Over time the original formula (Basic POR15) turns chalky from UV exposure. Not so much an issue underneath a car, but it will still happen. So it's reccomended to give it a top-coat. Using the POR15 like a primer. I think POR has newer formulas that take care of this though.
Also, heed the warnings on the can. If you get it on you, get it off while it's still wet or you're gonna be wearin it for a week or two. And especially make sure you clean the lip of the can very well, or you're gonna be destroying the can to get back into it next time
Pervious thoughts on applying it over things I agree with. Get the surface as clean as possible, and you'll be fine
 
Put a plastic bag over the can and then the lid, it will seal but the paint will stick to the bag otherwise it will not reopen.
 
I agree with the statements about at least scuffing the paint before applying POR-15. The rougher the better. POR-15 tends to develop a crust on top inside of a partially used can. The next time you use it, you have to break the crust which contaminates the liquid with fragments of dried paint. The best solution is to divide the quart can into several smaller portions. Use baby food jars or any other air tight disposable containers. TURN THEM UPSIDE DOWN to avoid the crust. Store them in the fridge to keep them fresh longer.

Dave
 
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