I'm stuck on how to paint these guys. Ones thought was bone colored, the other is camouflage since they are infiltrators. Any suggestions?

Do you have an aerographer ?

I would say dark puprple for teh body with lighter color (blue ?) on the hands and proeminetn part of the face.

For the armor : bronze with black/metalic washes.

You can use bleshed bon color on the horns/fang to enlight the miniuature an dfocus the attention to the face.