Two things. First, don't use an oven you plan on using for food afterward. The smell of the powdercoat NEVER goes away.(ask me how I know) Second, aluminum that's been heat-treated should not be heated much beyond 300-350F lest it be annealed to a much softer and weaker (T-0) condition. For some parts, this might be OK, but for landing gear you should consider paint instead.