Overdying a faded black after finishing

[skivery7]

Does anyone have any good info or experience in overdying black leather after its been finished? I sent a black Fiebings  pro-dyed project out last year to a customer, who has now come back to say that its faded and would like it redyed black. Its a 4' round  tooled coffee table top, and here, in order, is what's on it: Neetsfoot, black pro dye, bag kote, antique paste, Skidmores waterproofing cream....This last step is primarily bees wax I think.

If I was to dye it black again, I'm thinking I probably need to remove some of that Skidmores at the least, so that the dye can penetrate. Any ideas? ...Anyone know if a deglaze will cut through a waxed finish?