Be prepared to go slow, very slow. I also found a good magnifying lens that you do not need to hold with your hands helpful.
My first attempt was trying to freshen the checkering of a shotgun fore-stock, it turned out so bad I mounted it on a piece of walnut as a reminder to me that quality does indeed takes time.
You will also be amazed when you go to your next gunshow by the large amount of poor checkering jobs you will see, and you will also really appreciate the well done ones.