Bangin' around can make your day go really bad. Take today for instance. I'm putting a good coat of oil on the fretboard/neck which happens to be in my wood vise when the whole thing slips out! SH17! Frig!
I had put some small but very noticeable dents in the neck. With the clear coat on, it was easy to see. What to do? I can't sell this one!!!
Solution: I took a piece of parchment paper (for cooking), folded it up and layed it over the dents. Then I took a ink pen (shaft or other round object) and rubbed over the dent areas. This acted as a burnisher to lessen the effect of the dents. Sorta making one large, unnoticeable dent from a few smaller ones.
Now you can't even tell. This ONLY works on small, shallow dents. Larger dents (> 1/4" and not shallow) are not going to work the same.