I started using Ren. Wax after reading much about it here a number of months back. Like many others I've used it on blued guns like my model 10 - it vastly improved the appearance of the bluing. It also worked well on my nickeled 22-4 since it imparts a fingerprint and fouling resistant quality to it. It especially works well on the Ahrends grips - it brings out the wood grain and gives them a slightly "grippier" feel.

Once you've used it on firearms, give it a try on other things like the silverware, antique clocks or as Barb said the car - it gives a subtle yet impressive sheen to all sorts of other things.