Byrddog, that's interesting stuff. You are correct that walnut sandings turn dark with the epoxy addition. My experience when using colored "glues" is to have the glue lighter than the gunstock when applying repairs. The repair always seems to be too dark otherwise.

Some years ago I purchased some epoxy or acraglass stains from Brownells. I don't know if they still have them. Do you know if they worked properly ? I remember a bit of the stain would color quite a bit of epoxy.