Many shops recommend refinishing dings, dents meaning removing the finish from the entire face, side or back of the guitar if that’s where the damage is, repairing it, then applying new finish.   If you talk with the best luthiers in the world though, most will tell you to leave them alone. The reason shops recommend refinishing is it’s an expensive procedure. You can easily spend $700-1000+ refinishing a portion of a guitar because of the hours involved.   The problem with refinishing is not only is it expensive, but you’re layering new finish over old finish and this ruins sound quality.   There’s a reason players like Willie Nelson don't refinish their guitar. https://www.texasmonthly.com/arts-entertainment/trigger/