In the past I have stripped antique furniture and as with a gun stock some areas can be tough to get into & get the old material out of. A product that I found that works really well is a spray paint remover from NAPA Auto Parts. I spray it on, let it set & use the appropriate item to remove the old finish. Old toothbrushes work well for this. http://www.napaonline.com/Search/Detail.aspx?R=MSRDS3035_0006419962#