I just bought some black Por 15 but haven't opened it yet. I am hearing about how sturdy it is when hardened. I have a set of cookie cutters that need to be done and I am wondering if anyone has used Por 15 on wheels?

You may want to read the label for POR 15. Depends on which product you are using. If I remember correctly the POR 15 is affected by UV rays which can affect the appearance of the product. Don't have any first hand experience as all the areas I used it on don't see any sun light.

I would say no. The por has to be top coated as it is not UV resistant. Any chips in the top coat and the por beneath will be exposed. The UV exposure will make it want to flake/ peel off.

The bigger question is why por aluminum wheels. Thought por15 was for rust?

It's for rust. People say it dries hard so I thought it might be better then spray paint. I dismissed the UV protection though.

It does dry very hard and durable. I have it on the floor (inside) of
my car and I stick a 50lb magnet on it to hold some sensors and it
holds up well.

However, I also just for the heck of it painted a pole holding my
house antenna, and it gets very streaky gray after a while in the
sun.

So I would not use POR-15 on wheels.

Cookie cutters don't rust. They're aluminum...

The surface will look dull after a week and will never ever again clean up to a nice shiny black.

POR15 is the wrong product for a whole bag of reasons.

I had a bit left over and I spotted it on a VW hood just for temporary protection till I got to it. Temporary is all I got, besides going grey it flaked off in a couple of years.

Personally, for chassis panels I find a wire wheel on a grinder, etc. down to bare metal, epoxy and Nason black paint (with just cheap hardner) does a better job.

Thanks for the feedback... lack of UV protection is the winner . Not interested in the shine, I want them "flatish" black... but will go another UV protection route.

The thread title made me think your car was a real rust bucket! Nothing but POR15 on wheels!

Damn Mark, I have got to have you build an engine for me if you call 2 yr's temporary.

It was on my old squareback, pretty low on my list of projects. I never did fix it, I sold it.

That's funny. My '72 has no rust and my '75 has got a hell hole issue (really nothing major at all), surface rust on the hood and trunk, but I'm switching those to fiberglass. Definitely no rust on the wheels... they're aluminum