you might be surprised on how a hone could smooth that out. If it was me, I would either take it to a smith and have him try to hone it, or get a hone yourself and spend a little time with a drill motor, the hone and some oil
what looks awful bad magnified, isn't as bad in real life. also what you could be seeing is accumulation/build up of crud from time/shooting/lack of good cleaning
this is an example of the kind of hone I am talking about
http://www.midwayusa.com/product/147...ge-12-800-grit