05-25-2010, 10:45 AM
Fibreglas won't be the problem if you're making a two part mould. You just want to make sure that the mould has a jacket strong enough to hold the silicone weight when pouring the mould resin in. Use fibreglas for the shell of your model so that you won't have to pressurise your resins. This will allow you to make a model without having to buy all kinds of expensive equipment.
As for the undercuts, I suggest putting very thin styrene over them if you can, then cut them out after moulding. It depends on how many you have, but if this is not a production model, then I wouldn't worry about that as you'll only need to do it one time.
As for the undercuts, I suggest putting very thin styrene over them if you can, then cut them out after moulding. It depends on how many you have, but if this is not a production model, then I wouldn't worry about that as you'll only need to do it one time.
~ Cobra Chris