Here's something I found that I like... it's Createx "transparent" paint, shown here in white. Not sure why they call it "transparent", because it appears to be fairly opaque. It's actually designed for airbrushing and made for porous materials like fabric and leather. I use it with bristle brushes diluted with water about 1:1 (50%), and it behaves somewhat like a dye, in that is absorbs into the leather enough to allow the surface texture of the leather to come through, yet coats well. (After a second or third coat.)
Also, it naturally repels (resists) antique, so the color really shows well through an application of antique.
Painted on bare leather...
After applying antique...
