Rust-Oleum 249340 Automotive 12oz High Heat Primer Spray Paint, Gray 12 oz 249340 1

Excellent product.Very happy with the results.A++++

Great coverage and a necessary to use before applying the top coat of high heat paint. Follow instructions

Had some rust spots developing on a pellet smoker. I pulled the metal cover off and sanded it down to remove the rust and then hit it with this primer. Primer lays down nice and smooth and dries almost instantly. I'm still working on a stainless steel high temperature finish coat but I believe that this primer will help to ensure good adhesion and eliminate any potential for peeling or blistering for temps up to 500F that I regularly cook at.

Its thick and covers properly, cant tell about how strong to protect from rust.. I used it as primer and its good

Works very well when certain common sense best practices are followed. Clean the part thoroughly, that means basic and acid washes beforehand, rough up surface (I used 60 grit) where applicable. Once clean always hold part with hanger or clean non-powdered gloves, after first coat, the same precaution needs to be adhered to. Coats should be thin and consistent. Ideally I would not move forward to final color coats with anything less than two complete prime coats. Part of the reason I coated my exhaust is that I am moving to a winter salt state, soooooo yeah, coat it or watch it rust into oblivion. I tend to go overboard on everything, so the whole system has 4-6 coats of primer depending on location and base metal, with 1-3 curing cycles (where possible), prior to color coats. Coverage is actually pretty good. After the priming process I sanded again after curing but prior to final color coat. I used black, but I imagine most colors (which are in no way true to color expectations or vibrancy... this stuff isn't jet-hot) will hold up the same depending on application and part cleanliness throughout the process. If applied and cured properly I see no reason why flaking, delamination, or "chipping" should be too much of an issue within reason. I'm a year into this job and as of my last oil change, I was able to fully inspect my work and found none of the above. I am happy with the product so far and it worth noting, this is NOT a thermal coating, it is purely protective.... and i suppose aesthetic for some. Time consuming to do right, but if the purpose is to protect your investment, well, take the time and do it right. Can you just go to town on an exhaust part and throw it on the car? Sure. Will it be as durable? Probably not. Take all of this as you will.