DocEd is right on with his comments. Matte finishes such as those on the upper end Rem 700 stainless rifles are pretty soft and would polish out pretty easily. Others use a very aggressive matte finish and with those you would have alot more work involved.
The only problem doing it by hand would be first of all the forearm cramping!!! /ubbthreads/images/graemlins/blush.gif But most importantly getting the finish even and looking good.
I use a barrel spinner and a high speed belt sander. Start with a 400 grit belt to clean up all the matting and then finish up with a belt grit of 600. THis will put a pretty good finish on any barrel and do it quickly but you need to have the tools. If you want a really high sheen barrel, I will clamp the barrel threads in the chuck and support the muzzle with a live center of the tailstock and polish the barrel down to emary cloth finish. this takes alot of time and I really do not like polishing on the lathe. Have to be really careful to keep the fine particals off your lathe bed.
By hand, it would be alot of work and very difficult to get the finish nice and even.
Kirby Allen(50)