About 150 degrees. Then paint with wrinkle a thin coat. Back in oven for 10 min. Then a couple more coats. The light coats will give extremely even wrinkle. Finally bake at 350 for 45min to 1 hour.
Very durable. Way more durable than any spray can paint at room temperature. I'd say 60% to 75% as durable between regular spray can and powder coating.
The run in and buildup on the valve cover was because I put too much paint on it to start and higher heat. The air cleaner lid was with the light coat method with less heat. The air cleaner was 100% better.