My best advice is to hop on I-90 out to Elgin and pay a visit to the Leather Factory . . . or at least give them a call and ask what your options may be. The guys there are really great and have a wealth of info. They may be able to shed some light on exactly what you'll need and even how to do it.
I'd recommend using a deglazer on it first, then a few coats of Fiebing's white leather dye letting each coat fully dry before applying a new coat. After that, seal it with an acrylic resolene. I've made a few Imperial black belts before using these products, and it's always worked out well for me.
Leather Factory
1041 Davis Road
Elgin, IL
847-289-5227