JWilliam,I did 2 boar skulls a few years ago.1st, just remove as much tissue as you can with a scalpel or knife and then throw it in a large pot of boiling water and add a little bit of tide detergent.Keep an eye on it and when it starts to get transparent or pinkish in spots take it out and flesh it again.Keep doing it until its really clean and then brush on some peroxide,the kind they use for bleaching hair.Do this in the sun if you can,itll help a lot.When it gets as white as you want it rub baking soda on it to stop the bleaching.They can still be a little greasy but a little soap will cut it.Ive done quite a few skulls like this and it works out pretty well.