Its easy to polish. I had to do it on my deercreek's patch box. Started out with 220 grit sandpaper on a sandblock, took out all the roughtness/file marks and then used 400 grit and worked my way to 2000 grit to really polish it. Used 0000 steelwool after the 2000 grit.
This would look nice on a GPR.
http://www.trackofthewolf.com/(S(fab31lqn3md0ijicx20d0545))/categories/PARTDETAIL.ASPX?CATID=14&SUBID=151&STYLEID =582&PARTNUM=PB-HAWKEN-3-S

I rarely carry patches in a patch box, but its a good place to store items such as cleaning jags, ball puller or even a small tin of extra caps.