Here goes a custom Mandalorian I completed a few weeks ago, but haven't gotten around to taking pictures. He's made using a gi joe base figure, that was completely dremeled down to a skeletal frame (except for shoes and hands). He was body was totally sculpted over using Aves Fix It.
The helmet was from a clone trooper, modified to look more Mandalorian like. The back jetpack was cobbled together from some Star Wars backpack with some Iron Man weapon parts for the thrusters.
Total re-paint.

Enjoy.