I have actually listed multiple painting methods before, they are on here. I cannot remember the thread names though. FW Inks will bond to a certain degree to Prosaide, but after a certain amount of layers they will be prone to cracking. Permawet is more of sealer than a base or primer. Prosaide is actually a medical adhesive. Faux leather is almost always vinyl, and nothing really bonds to vinyl over the long haul, not even rubber cement, except vinyl based paint systems, the crappy paint you see on cheap Halloween masks. The prosaide might yield a decent bond in the beginning, but hard to say how long it will last. For solvent based paint systems, there are no perfect ratios, as we often mix them by eye, adding a little solvent at a time until ideal viscosity is reached.
Questions?