Just as an update, my AR speaker refinishing has reached the final prep stage. I have finished sanding all sides, and have also taken quite some time to work with the smaller scratches, dented bottom corners, etc. I used Minwax High Performance wood filler, a two part (?epoxy) filler. I found this to cure to a very hard form, unlike the other Minwax product called Stainable wood filler. Minwax claims both are stainable, but of course they won’t match the surrounding wood. I've used filler only u