That surform will work to rough it down, but don't go too far...it will take it off quick. If you are getting into gunbuilding,
you will need some Nicholson cabinetmakers rasps, a #49, or #50.....either one will work. Then, after you get that
forend close, use a long sanding block..3" x 8", with 80 to 100 grit paper on it. Run the block lengthwise, it will remove
all the lumps and dips and will get that forend straightened out. As for a wooden patch box, if you don't feel comfortable
in doing it, forget it. Rasp or sand off that area to match the rest of the buttstock. You could leave the cheekpiece, and
I would feel comfortable using a fowler guard, be it a smoothbore fowler, or smooth rifle....your choice............Don