I use blocks of wood with lots of holes drilled in them to accomondate most legpositions. The holes to be used is filled with Blue Tac.
In every figure I drill a hole in one foot, often in both especially heavier figures in metal. It is important that the hole is drilled to pass by the ankle of the figure for great support. Again more important in metal figures. In the hole I glue a bit of pianowire withe expoxyglue.
Now you can handle the figure without leaving fingerprints or damaging it. Also easy to put down without tipping over or damaging the paintjob. Usually you can reach everywhere and if done correctly theres no problem to hold it upside down when painting.
Cheers