I buy those little 'childrens' paint brushes at Walmart ( packs of 30, about a buck fifty) and trim the bristles down to about a quarter inch in length. Much easier to handle than toothpicks, and quicker. I pour on the average of 16 wheels at a time, so speed is of the essence. I also use a spray mold release; baby powder is too slow, too messy, and sometimes leaves a 'cast look' surface on your resin part. It also seems to double the life of my molds.....I also found, when casting small pieces like wheels, the resin does not build up enough heat to cure completely. I pop my molds in a dehrydator for 15 minutes, and let cool before removing from the mold................'Z'