I started using FL about 2 month ago and treated all my handguns with it (made the heat treatment 3 times just in case) All I can say is Wow. This thing works on Polymer, Aluminum and Stainless Steel frames. More than 1000 rounds thru all my handguns and they look and feel great. After a range trip you only have to wipe with a cloth, put a bit on the rails and other friction parts and the gun is good to go.