I am more than happy to share how I did it
For few years on past sculpt attempt I used producst from http://www.smooth-on.com/ or http://www.reynoldsam.com/ if you leave on the west Coast to reduce the cost of shipping and time delivery
I used OOMOO silicone rubber to mold the printed pieces.
Then I melt the castilene wax in a crock pot and pour it in the mold that I heated with a heat gun.
When I have all the part in Castilene put together I wanted to do a mold that I can brush on to not have a mold in 2 pieces.
I used the silicone Rebound.
The only issue with my process is castilene is fragile and after removing the final mold it damaged the parts and I will need to reworks the seams after reassembling it …hopefully the mold will last for enough copies to start a Kickstarter soon.
Would a 2 part mold have worked ? possible I just wanted to have less flashing to clean and the Rebound mold resist better to tearing than the oomoo silicone
I learn a lot from the video tutorial on that smooth on website.
I will upload some photos of the mold and in between stages soon