Originally posted by Mk.IV:
I use silicone spray to protect the the metal from corrosion.
I spray silicone on the gun, let the silicone dry (about 15-20 minutes), and wipe with a silicone rag to evenly cover the metal surfaces.
Then I spray the silicone into my holster and let it dry.
This treatment makes the draw and the re-holstering of the gun very smooth!
For lubrication of the gun, I use Tetra-Gun Grease on the rails and the locking-lugs, and Break-Free CLP everywhere else.