Eastwood's 2K AeroSpray™ High-Gloss Clear
Product Review (submitted on June 1, 2014):
Used mine on Aluminum intake and valve covers. Both very porous. Everytime I touched them ,dirt or grease spots would show. Now totally protected ,no problems with engine heat ,and engine looks clean all the time. As far as Brian's reply . Wrap in Plastic wrap and put in freezer. Will last up to two weeks. Saw this ,I think it was in "Hot Rod", it works.