Yeah, you see it done on pistols all the time, but I think it could easily be done on the 715 once the quadrail is removed. I'm going to try it in the next few days, ill post pictures.
Took about a half hour with some cotton balls and fine steel wool. The barrel was shining bright when I was done. You'll need to wear a mask though, 'cause it is some pretty stout smellin stuff...