Aw, Hell, why don't you.................
take the barreled receiver out of the stock, and put some tape around the receiver, take the scope off, too, while you're at it. Then, get yourself a cold drink, and some 80Grit. Take all this out on the lawn, or in the backyard, and set down in your favorite lawn chair. Gently place the receiver between your legs, and wrap the 80grit around the barrel; then, using gently reciprocating strokes, begin to polish the barrel up, an' down, an' all aroun'. The point is, if you "polish" the entire barrel this way, might take you an hour or two, so sit under a tree, and make sure you have a pitcher to top off your drink when necessary; Soon, you won't ever see that scatch you were in a tither over. The neighbors will have untold questions in their minds, wondering just WHAT you could POSSibly be doing that was having any positive effect. But you, sly devil that you are, just let them go on wonderin'....and if the wife,(who's been ASKED by the neighbors what you're doing)asks, just look at her and say, "Nothing, Dear" Think of all the fun you can have with all the nosy neighbors(a radio outside so you can keep time is also handy), while you erase that original, pesky scratch or two, that you used to agonize over!!