depending on the brand used. You can like me leave in balancing on top of your scanner between sculpting sessions (just keep it away from the cats ) I used a ball of tinfoil to form the helmet and then dug it out (harder than you think) after it was cured in the oven. Also i used different shades of sculpy to help me form the different layers of the helmet and not get lost with what went where and keep it (sort of symmetrical)
He's in white primer now but i need to get some pics done of him plus there's some touching up to do before i paint him up and try to figure out how I'm going to attach him to the dio i have planned. The dio btw is on hold now till September/October when we will be starting a hopefully a group build at SFM:UK based on machinen Kreiger and the repop of the Kauz and Fliege and the new Snake eye. More info about them can be found out here http://maschinenkrueger.com/forum/index.php?topic=3216.0 I'm going to try to do 2 builds for this ( rendom baouts of insanity do run in the family :) A fire ball already started and a Fliege so i can cover both Merc and SDR space based suits, I hope, well that's the plan and I'm sticking to it-ish.