yes you can degrease in the pickle, and Aubrey is right, it's probably easier for a guy with limited space, if you are going to try and defgrease something like a bear, that's where you'll find it's worth the extra effort to degrease separate. This has been brought up before about tan instructions, and what I've stated is the manufacturer, BASF for Lutan, does not really give instructions, what you all have been reading for years is a suppliers opinion, not a tanners experience. Aubrey is the manufacturer of Perma-Tan 2000, he's the one that knows what's in it and how it works. We try to keep it simple for in shop tanning, what we do goes much deeper but you don't need to be concerned with that for in shop. The one principle you need to keep in mind with an immersion, it bonds as the pH is raised. It takes time for the tan to penetrate through the fibers to "find" the available tanning sites deeper in the skin, if you put a skin that has been neutralised in the tan the pH is already above the bonding point, as the pH of the skin is going down due to the acid in the tan, and the pH of the tan solution is raising due to the pH of the skin you are hoping that they meet somewhere in the middle and tan has actually made it into the inner fibers instead of surface tanning and leaving you with a pickled skin inside.