Well Scott the first thing that will need to be done is to rub down the stock to at minimum 320 grit all over. Then you need to go all over the stock with a sanding sealer, you have a choice either a spirit, acrylic or shellac. But really you would only go for either the spirit or acrylic, spirit is cellulose based and acrylic is water based. Whichever you choose the procedure is the same.
After sanding you then go all over with the sanding sealer, wait for it to dry. This will raise the grain so sand again with the grade of sandpaper as you finished with the first time round. The idea behin