I've been using Shooter's Choice grease (syringe applicator) on my centerfire handguns, Glock 17 included. I put a dab at all the spots recommended in the Glock manual and spread it around with a Q-Tip. I find CLP and other oils tend to bleed out all over the whole gun. The grease stays where I put it, doesn't evaporate, and lubes just fine. There is no concern over rust on a Glock.