I bought an auto tanner when they first came out, can't remember exactly when. In the 1990's sometime. I like it, very little or no shrinkage. I use the tanning crystals, pickle oil and pre tan 110 put the hide in run for 3-4 hours or over night.Then shave it and put back in tanning crystals, pickle oil and liqua-tan. run again for for a couple hours take out drain, pat dry, rub liqua-tan on the hide fold up and either freeze or let sit over night and mount. I still have heads from back then and they still look as good as good as I could do back then.
Shave good, add liqua-tan to nose and eyes as it dries, and i keep a plastic bag over it for the first few days to slow the drying down a bit.
Sounds like alot of supplies and effort. Have you ever tried pickling it, shaving it and using the liqua-tan only? gary