Without seeing the piece it is hard to know what you are dealing with, but if you want a satin finish look you could probably get it with 0000 steel wool and some elbow grease. If you want a high gloss look you will probably need a buffing wheel and jewelers rouge. I wonder though if the action was painted or teflon coated? It doesn't matter at this point, but I've got a custom FN mauser that I had teflon coated matt black and have to be careful cause the teflon, though durable, will chip.