a little bit. We used it on our exposed aluminum aircraft trim and other bare aluminum components for our SAR planes. What we did was polish up the stuff first with then apply this stuff and let it dry. Seemed to hold up pretty well. I don't recall re-applying it personally. nor can I say how well it'd do on high temp areas, say around the exhaust ports. But I plan on using it on my intake on my 440 and my water pump.
