•Two bits of clear plastic (the plastic from the clam shell packages are ideal.)
•Petrolium jelly. Any Vaseline will do. I’m using sculpting Vaseline.
•Greenstuff. You can give it a go with miliput but I’ve not tried it. And greenstuff is pliable.
Right let’s do this.
First you want to cut your plastic into two sheets
Rub a little Vaseline onto each to stop the greenstuff sticking
I use a rubber sculpting tool to push it into position, I start by getting the corners and pushing them into voids in the model with a cocktail stick, under shoulder pads or hip pads are best. Then using a small rubber sculpting tool manipulate it into shape, if you don't have one of these get a cheap pencil with a rubber on the end and shave it into a chisel shape. boom cut price sculpting tool. Don't use dental tools for this step. although you may feel you have more control with them you will end up squashing it into shapes with hard edges. The rubber tools are the way to go. Now leave to dry and presto, loin cloths, cloaks, and drying human skins for days!
Greenstuff sculpting is still quite a new area for me too so this is very much my own uninformed opinion. Good luck. And happy painting.