Over the years I've collected quite a few deer heads from many hunting seasons, and due to the lack of funds at those times never got them mounted. Not very long ago I decided that some of them were way too nice to just let hang in the barn and thus determined to do some European mounts after doing a lot of reading on the subject. Unfortunately, due to laziness at the time of harvest, some of these heads were simply hacked off below the skull and hung up in the barn to dry, and as you can imagine they have not been pleasant to work with. I have now simmered (with washing soda), pressure washed and whitened about 10 of them since January. As you can imagine, some of them (up to 12-14 years old) are hardly scent free even after this process. In fact, about an hour ago I received a text from my wife asking if she could put the latest two (still coated with the H2O2/basic white mixture) out on the porch because they were stinking pretty badly. Both of these still had the hide attached before I performed the simmering process this last Saturday, one being 5 years old and the other being 11 years old. Some of the previous skulls also have a little bit of the same problem but it's usually only detectable when getting really close and intentionally taking a whiff. So, what would be my best option to get these as scent free as possible? I'm not a taxidermist but tend to be willing to try new things after doing the research. At this point I have not used any sealer on any of the skulls, so there's no finish that needs to be removed. Thanks in advance. P.S. Yes, future heads will be skinned and frozen soon after harvest. Lesson learned.