If you are asking about inletting the star I use an exacto knife with a #11 blade, I grind off about a 1/16" of the tip ( grind at about a 30 angle and buff the blade on a wheel, it's like strapping the blade) so it will not snap off in the wood while I'm carving/ cutting. As for engravers, you can get them fron Track or Rio Grand I would get a 5 line shader an oglet and a knife graver. You will need to put handles on them, also you'll need a lite chasing hammer, I got a nice one at A.C. Moore in the jewelry making section, You need to sharpen them with/ at a 45 degree angle with about a 30 degree angle on the under side so that you can "peel out" of your work. Remember, they MUST be sharp or you'll booger it all up, check them by pushing the tip against your thumb nail, if they skip and leave a white line they aren't sharp, if they hit and stick they are ready (kind of like checking a fishing hook). Track offers a good book about engraving, "The Art of Engraving" that I would suggest you get before going forward. Practice on something else like you did with the carving before you go for the star. Remember to keep a steady hand and DON'T RUSH, if you get off a bit don't try to go back over it and correct it, just work it in to the design, otherwise it will look like ass.
As a gun smith you have to be proficient in several things like metal fabrication, wood carving, lock smithing and engraving, all of these things come together to build a gun that is graceful and pleasing to one's eye. As for those people who say "I'd never take it hunting" SHAME on them! I have built myself and others rifles into the 5000.00 range and shoot matches and hunt with them all the time. Why not? That's what they were intended for!
Matter of fact, if I hear "I'd never take it hunting" I usually up the price by 500.00!