Mark-Anaheim
TVWBB Member
I am not saying it will not stick, I just don't recommend it. I am not sure what agent Rust-oleum uses in their high-heat paint to make it dry-flat, I want every layer to have maximum strength for durability.So what you are saying is that the ultra won't stick to the flat? I'll have to think about that one because I think I've done it before.
I have sprayed hundreds of gallons of automotive, or aircraft urethanes, and after primer, you stay with a gloss 100% as they have higher mil thickness to wet sand than flat finishes.
I use General Finishes for my custom cabinets and the white oak slats for my Weber, and stay Semi-gloss on all 3 coats due to build thickness. With my nail strips I was able to flip and spray 3 coats sanded between on 40+ slats both sides in 1 day.
Just sharing my recommendations of not mixing sheens with high-heat paint, but you will be fine.