[rhmc24]

More about epoxy/sawdust filler. I save sawdust from my bandsaw in an old coffee can. It's more like saw chips than dust. Epoxy permeates the fine chips. I don't know of any advantage in powdery fineness.

I have used this to do major fills, easily quarter inch and more. To economize on glue, I will roughly fit in a piece of solid wood and just fill around it. The epoxy mix is stronger than the wood it is used with, usually. Sometimes shotgun recoil knocks out a bit chip at the receiver interface. I fill it with my mix but to keep it from chipping out again, I put in a couple of pegs to take strain off the interface of mix to stock. Important in this case is to put in a sheet of plastic between the fill and the receiver and remove after. Otherwise your fill repair will have a better fit than the rest of the wood and take all the recoil.

Color wise, epoxy is tolerant of most anything other than water base. I have used leather dye (dye, not wax polish), oil paint, acrylic, artists powders, etc. to improve color matcdh. Tiny amounts added usually give good results. Add a lot and you begin to affect the strength of the glue mix, which may or not be important to a fill job.