This thread is a bit dead, but I'd like to revive it since I'm manifesting many a colorful Coach in my future. I just finished working on a bag in Leaf and I think I achieved a rather close match for it.
What has helped me a lot in the rehab process is to use leather scraps to test out products and tools. I also first tested the paint match on a piece of lighter leather to see what shade it dries down to, rather than to see how it ends up on the bag.
What I did was that when I thought I had achieved a decent match I took some and spread on the leather strip. I used a rounded butter knife instead of a brush, because I wanted to get a decently thick layer with the least amount of surface texture. This would give me the best idea of the actual shade of the paint so the color of the leather underneath doesn't show and there is no surface texture creating shadows. Dried it with a blow drier.
I used a total of 4 shades of Angelus paints: Avocado, Yellow, Blue and White.
I had gotten Avocado some time ago because in the bottle it's almost exactly the right shade for the bag I have, but it dries much darker. Adding only white doesn't work because it also immediately dulls the tone. So I got the most basic blue and yellow shades to see if I can mix up a closer match, but after playing around for a while I started another mix using Avocado as the basis and this is what got me the best result.
Basically you assess how much paint you're going to need and then take that amount of Avocado because you only need to add very little of the other shades. The second one to add would be the yellow, this both brightens and lightens it. But to cool it down you need to add a bit of blue back in. And then the last step is to add white in case you need to. This comes down to the specific Leaf you're working on. I added a bit of white at the very end because for me the shade dried down a tiny bit too dark. Yellow alone won't fix that because it immediately also shifts the temperature of the shade.
Hope this helps.
