Hmm... I'd do multiple thin layers. It's like cooking or chemistry or whatever. You can add easily, but taking away is awfully difficult. Dwarf flesh is a bit darker than Snakebite leather, too, so you might want to flip those in the order.
Incidentally, enamel has its uses. Painting terrain that requires slightly thicker paint, like some less-detailed buildings, rock formations, etc. Things you can't spray... testors makes a great undercoat. Personally, I don't touch the stuff, but I know a few too many people who do.