You can\'t really blend on small surfaces, you have to fudge it a bit... it also depends on how small you mean by small. I\'m talking about things like buttons for example. When I do those I usually just use two colors. You can still blend things that are somewhat larger than buttons, like scabbards, bags, etc, but I often cheat using only 2 or 3 layers (and I layer rather than blend, but I tend to layer rather than blend almost all the time anyways). Anyways, hope this helps...
--Katie G.