I was recently trying to fill an empty dovetail slot in a rifle, what a job that is. I tried pre-made fillers that are big gaudy, ugly things, I even tried to make my own out of brass. I finally just gave up on trying to be fancy, and bought some dovetail slot blank filler from Brownells. After cutting it just wider than the slot, I found it to be a little bit of a sloppy fit in the slot. I decided that I wanted it semi-permanent, so I epoxied it with JB weld. After it cured, I taped 3 layers of masking tape around the blank, and started working with the file. Once I got close, I switched to a smaller file, and slowed down, I got right down the the end, and slipped, TWICE. At that point, I decided it was close enough, and pulled the tape. Underneath are two very noticeable, but not very deep scratches, about 1/8" wide by 3/8" long. Before pulling the tape, I finished the filler with some finer emery cloth, and went with the grain of the barrel. The filler doesn't look half bad besides the bluing not taking my first try. The dings don't blend in so well. I'm going to try a different touch-up bluing, but am wondering if I should try and sand the scratches to kind of feather it out, or just blue it and ignore it? Maybe somebody has a better idea? I should clarify that by "going with the grain," the barrel has a bit of a brushed finish, and by sanding with that, it really blends in. I just worry it may do more harm than good in this case.