It has always been hard to avoid touching the figures when one colour is trying to dry and spoiling the look. By glueing them to a balsa stick (in this case I have used kebab sticks from your local supermarket -$2 a pack) you avoid too much man handling of the little person. I used a latex glue and let them set for about 10 minutes. Latex glue is better because it doesn't eat into the plastic and it is flexible.
I find that the odd figure comes loose, but the reglueing is worth it.
I tend to do one colour at a time therefore I might be working on a number of figures at once. The beauty of using the skewer sticks is that they are pointed at one end and can easily be poked into a peice of polystyrene as you wait to paint other figures and it is good for allowing them to dry.
Thanks Trevor.