My wife wants the grates on top of the cook stove power-coated. (not the burners) I'm wandering how power-coat wear?
Works good; lasts a long time. Most of them chalk in sunlight.
If they're not burners, what grates are you talking about? Powder coat will soften between 140-180 degrees. (Depending on type and first cure.) I would go with a ceramic coating if it's anywhere near heat. PC isn't a particularly good wear surface. There's powders that wear better over others but not many that will stand up to stove top use.
Powder coat looks great! Nice and shiny. Just don't use any abrasive (ie. brillo pads, ajax, etc.) on it, or it will dull to never shine again till being powder coated again! This is something to keep in mind especially when you do your rims.
I get the impression many people think of powder coating as an enamel or ceramic coating because it is a baked on process. A friend of mine has a powder coating and plating business near me and he explained it to me as "Just another way of painting". I think with that in mind, manifold and cooking grill paints would stand up to much higher temps than powder coating.
Ken, I think he is talking about the cast iron grate above the burner on a gas cook stove. Dave