if just done a test with HPI's Microlon spray. i used it to treat my NSR parts. i also modified the NSR. it is now called the RCU HYPERmod NSR. it's definately now one of the quickest motors, if not the quickest down the very large straight of my local track in sydney australia ( www.nswrcrcc.org
have a read of the review and the rundown at
it is the link marked "new"
microlon has made my motor run at least 15 degrees cooler.
a full solo review of microlon as a metal treatment is coming soon, i also am currently using it on my bearings of my electric car.