Depends on what kind of "fake stag" material is used. I have made items with several faux ivory materials. Some take aging some don't. I like micarta because it is naturally kinda patinaed. I won't work with real ivory (elephant or walrus) because it is so brittle it is guaranteed to shatter into a jillion pieces just about when your project is finished. I don't like mastodon ivory either because it is fossilized and is basically rock, not great for tools. I just bought a set of grips for one of my revolvers (grips would fit a ROA for legality here). I don't know what kind of material they are but they look like aged and patinaed bone, very attractive to my eye. (expensive, if I didn't like them I wouldn't have bought them.