painting metal heat ducts
Don't know where to post this for sure, so if I posted this in the wrong forum sorry.
I just bought a new house and the basement, isn't finished. We wired it,and sheetrocked it. On the ceiling there is some ugly metal heat ducts. Not sure how warm they get. They run almost the entire length of the ceiling. We want to spray paint them, with Rust-Olem American Accents stonetextured finish. It's $8.00 and we bought 5 cans to start with. It'll probably take that many more. My questions are it says it's for metal, but how will it stand up to any heat? Can we prime it with any cheap primer for metal, before we put on the expensive paint?
Thanks in advance for your help