Sure!
Actually epoxy can be used to build it up, but what a pain in the butt!
The easiest way is to go to your linen drawer and find that roll of the ugliest stuff you have. You know that roll that you bought for that one cue and you have never used it again because it is ugly! Then, just wrap the cue with the ugly stuff and wipe the epoxy into that. Let it dry and sand it down to the size you need and wrap it up with the color you want. The linen underneath keeps the epoxy nice and even so you don't have to worry about high and low spots.
Royce Bunnell
www.obcues.com