A friend of mine at work is a great believer in shellac as a finish and many use it as a sealer. Tested shellac before adding dye but the colour did not develop as much. I assume shellac sealed the wood and prevented the dye from adsorbing into the wood. Applied shellac after the stain (about 9 thin coats and sanding with 400 grit after each 3 coats). It slightly altered the colour but the glue stains disappeared! The photos show both the front and neck with wipe on poly on the front and tru oil on neck. No final finish is on the sides or back as yet. For people with glue problems shellac may be worth trying especially for lighter stains. I assume that shellac may be able to coat the glue stains.
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