Prevention...
Really, you shouldn\'t have a problem with the paint running into the crevices. The key is to find the right mixture of paint/extender/flow-aid/water to allow the paint to stay wet but not be as runny as a track star. If you\'re diluting with a ration of 1:3 (paint to extender/flow-aid/water) it should keep the paint moist for a while, but still have enough surface tension of the paint to stay where you put it. When you get your paintbrush wet to extend the paint out, make sure it\'s just damp, otherwise it WILL run into the crevices. Hope that helped Wurz.
Brendon