I've decided in my great wisdom to do a monthly sculpting tip my first one is:
mix a bit of milliput in with your green stuff. this is for 3 reasons
1. It thickens out your expensive green stuff with cheaper milliput
2. It hardens a lot more like milliput allowing you to shave it with a sharp knife allowing you to smooth your miniatures out.
2. it makes the putty mixture a bit softer and clay-like which i have found to be better for sculpting fabrics etc...