That'll cool faster than bare aluminum or any other common engine paint. My nosedrive just got it'* new bearings and coating as well. My entire SC will be coated, but not my TB.
Haro'* need was due to cosmetics. His TB wasn't pretty, and bolting it up to that SC would be a crime, so I let him in on it to coat it with something that would not only LOOK good, but would also aid in cooling.
Keep in mind we don't know how this will hold up long-term. His TB, and my engine hoist brackets and SC will be the durability tests.