My stove top grates were a mess. Replacing them is expensive . You might as well buy a new stove top. Then I had an idea to purchase high heat resistant spray paint. Its the paint thats used to touch up an outdoor grill . It comes in gray, black or white at Home Depot . I did both the grates and white plates under the grate. I'm quite pleased on how they came out.
Heat Resistant Spray Paint | Stove Spray Paint Black spray paint come in 400ml aerosal can. Gives professional finish on stoves, boilers, exhausts etc. Resists temperatures of up to 600 degrees celsius. Prevents flaking and cracking on surface.