I’m having a very hard time removing some grease spots out of some whitetail antlers. The skull slipped just a little too far down into the degreasing tank at one point. I’m currently degreasing with ammonia and water at 120 degrees. Can I submerge the antlers in this solution? Any tips on how to get the grease out of the antlers? They are a bit sun bleached. This one has me stumped. Help!!!