You really need to watch my YouTube Video to see how easy it is to take a brand new out of the box gun and give it that weathered, old, worn and used look that you would find in a classic vintage gun like a Luger P.08, Colt 45 1911 or any other classic firearm. Of course this is something you would do to a new gun that you want to make look old :)
This is a great way to take a gun that already has some wear marks on it and really give it the full worn in look, kind of an alternative to having to touch it up or refinish it.
Here is a hint... I use something magical to do it!