Rebuilding your engine and want to do what the race car guys do? High performance engine builders have long suggested painting the internal surfaces of an engine to speed oil drain back. Painting the casting will give a smoother travel surface for the oil. Our people use and recommend General Electricâs Glystal paint. This is available from your local electrical warehouse distributor as it was designed to be used as paint for the covers of electrical motors. Use it in the lifter areas and front timing gear area and watch for faster oil circulation.