Slick 60's

Says it hooks on to rust...
Black or aluminum only colors
Made for agriculture... might be a good product
If I paint a frame, will give it a try

https://agriguardcoatings.com/collections/all

Interesting. Seems a lot like POR-15. Odd how their FAQ section says it dries faster with higher humidity. Also see where silver is for outdoor use, and black for indoor, where black will turn chalky and gray if used outdoors. I suppose for a frame where it's primarily covered, black would work.