making removeable helmets?

yeah they have the best thing going. Just make sure you put something like a toothpick on the part of the tin with crazy glue so you can push the tin with the sculpy off and boil it then if you have a dremel you can work the inside to be whatever you want. but I would try boiling it.please post back to tell us how it went?

I just have to come up with an idea for the helmet design. Guess I should wait for the figure to get here first so I can do it to scale.

aluminum foil's the way to go.
or you can use some baby oil/coocking oil and cover the head with it before sculpting so that the clay won't stick to the head and you can remove it when the sculpt hardens. baby powder also works. I used that technique when I sculpted a removable predator mask. it worked well for me.

I concur with leafman343--covering the head with aluminum foil, and then sculpting over it, ensures a good, but not too tight fit for a removable helmet/mask. I've used that technique many times successfully.

Yup, that's what I was gonna say, or find a helmet that fits loosely then sculpt round that.

Another way would be to put a few layers of cellophane wrap or aluminum foil over the head, then sculpt the helmet so a) the sculpt doesn't stick to the head and b) there is enough room inside the helmet that it won't fit too tightly and rub the paint.

I prefer changeable heads but if you must make the helmet removable than spray the head with clear mat sealant.