Re: Stenciling on M1 Garand and Carbine stocks
They are called rack numbers. You'll see them on the side of the butt as well as on the bottom of the pistol grip. Sometimes they are stamped in with punch-type stamps, sometimes stenciled and painted, sometimes both, sometimes overstamped and over painted on previous ones.
The important thing about an M1 stock's finish and whether or not to mess with it is this - someone that really knows M1s needs to look the stock over and assess its value. Depending on its maker, condition, and finish status, it may be worth a buttload as-is with the stencils left on or it could be just better than firewood and refinishing CORRECTLY will actually help its value.
Rare M1 stocks can fetch north of $1000 depending on what it is and its condition. For example, IHC stocks are some of the fewest produced and highly sought. That said, I have an IHC stock that is in such sad shape now that a thorough resto of its finish with lots of steaming to raise dents will increase its value. It has been so abused and finished over that it is just barely above firewood at this point. Conversely, if it were in the same original condition as some of my post-war SA and HRA stocks, that is basically new all original perfect finish no dents all cartouches intact, it would be worth close to $1k. When I get done with it, it WILL BE an IHC restored stock with the julian date in the barrel channel and correct lines of the pistol grip, so will go well on an IHC resto I'm working on, but it will never be worth what an original condition stock is. No I won't fake a new cartouche (small DAS on the right side upside down) on it.
If by chance you have a somewhat sought after stock in good condition with original finish and original cartouches intact, refinishing it could devalue it by in excess of 75%.
Until it has been evaluated we cannot tell you what to do with yours.