Originally Posted by
tiddle
Weeeeell, you could not really "pump", but raise the brush when swirling and slowly lower back into the bottom without stopping. You will need some air in the mix to get the volume, but you don't have to "pump" up and down. Try what I just suggested without stopping the circles. You hand will look almost like a drill press going up and down and spinning. Do it once or twice, but I wouldn't continually do it or you will introduce too much "fluff" for lack of a better word.