The Stovebolt Site Forums The Shop Area Paint and Body Shop por 15

i was going to have my cab sandblasted. I was going to paint the bottom of the cab and maybe inside with por 15 . but recently I read it breaks down over time from sun light should I use a different paint?

If you're going to sandblast, I'd just go with a good epoxy primer. If you've gotten rid of the rust (sandblasting), there's no need to go to the expense of POR15.

I am no paint expert. But I had old cars for 40 years.In the 80s I sandblasted and painted a car frame with rust mor and I still have that car the underneath looks great do they still sell this? Also i sandblasted a car and painted the frame the in the early 90s with acklic enamel I just sold that car but rust specs were starting to come through the paint so I dont want to use that. Any suggestions

FWIW I've had mixed results with POR15, but generally if I follow their instructions to a "T" the results have been good. No shortcuts. I always topcoat it.

Given it's highly affected by humidity, I'm speculating that results could vary a lot depending on a person's local conditions. We usually have high humidity up here.

Never heard of that. I've used Rustoleum primer years ago (and still use some on small parts). It eventually gives up when up against the elements.
Epoxy primer under that acrylic enamel should do the trick. The epoxy seals the metal against the elements and the enamel protects the epoxy against degradation from sunlight, etc. That's what I used on my frame.

There is a product called Rust Mort that may be what the OP is talking about. It converts the rust so it can be filled or painted.

Like you, I have had mixed results even with the POR15 top coat. My frame has really oxidized and even started peeling in spots. I may sand it and paint it with implement paint from Tractor Supply.

Thanks for all the replys. and now that you have said the name rust mort sounds like what I used

Late to the conversation, I recommend Master Series Silver. It will encapsulate any rust, become totally air tight.

I'm with Kevin. Blast and epoxy prime paint of your choice. Work any defects after that.

I use poor rustoleum rust reformer and poor rustoleum black over that. I prefer wire wheeling a frame so as not to get media inside differential, wheel bearings, joints. bushings, etc.....and it never leaves my possession.

I have used master series on my car trailer it sits out in all types of weather and after 10 years still looks good

So you are familiar with Master Series. Why not use it again?