SEM products for leather seats.

Has anyone used SEM products to change the color of their leather seats? The SEM products are excellent, in my experience, but I've only used them to change the color on door panels and a console (not on my wagon). I know they make custom mix spray cans, or pints, etc. of whatever color you want. I know they make a product specifically for leather and vinyl, and I was wondering if anyone has used it for the seats. Thanks.