I use them pretty much any time I use milliput - helps deal with sausage fingers (or not deal with them, depending on how you look at it) and generally useful for sculpting it at well after applying. Pretty much all styles that I can get my hands on, I keep. I have used all different styles picks to simulate damage, smooth putty or milliput to match contours or into gaps/holes, apply decals (back of the curved/angled heads - never the point), scribe/rescribe panel lines, and a thousand other things.