I did a huge deer rack that was bleached from hanging outside. I used tree branches and rubbed just like the deer would have done. Could not possibly look more natural.I stripped mine and immediately soaked them in a river. The blood washed off and I only had a little off pink coloring here and there. Over time they dried out and have turned mostly white. I plan on doing the coffee grounds staining technique to get the "hard horned" look. If the stains aren't too dark, you may be able to just stain them after the antlers full dry. I would ask a Mod to move this to the Taxidermy sub forum. Lots of experience frequent there.