there's a roofing company here that offers a white spray (of some sort) for roofs. My mentor back in the early 60's a radiator repairman sprayed his work black & someone else mentioned about it being a special thin paint but I'm sure aesthetics is important. I seem to have chronic issues with tranny leaks so I am gonna paint my next one white to help pin it down (& maybe get the MP pan gasket that gets good reviews) & confirm pan rails are flat, the holes especially.