So, I have been degreasing a gator skull for approximately 3 weeks with 115ish water/dawn soap. I changed the water again yesterday and that stuff was nasty stanky and greasy (to be expected). Also the skull is a funky pale yellowish color. I have some questions. Is this norm for degreasing a skull? The color that is. At what point do you know ok, this thing is done? Also once properly degreased will the skull whiten perfect? Thanks!