This is a video from my f35 where you can see how I build a mold from a 3d printed vertical stabilizer. If you like my channel, please hit the subscribe button.
Many people asked me what kind of material I used. So below a list with used material:


Glas fabric: 210 gram/M2 Twill 1/3
Epoxy: Epoxy Resin L + Hardener CL (60 min)
Mold release wax: Release wax
PVA: Film release agent PVA
Gelcoat: Mould resin P + Hardener EPH 161P
See https://shop1.rg.de/shop_e for all of the above

Putty spray: Motip spray putty
Filler: Albastine Superieure Muurvuller ( i don't know if you can get this outside the Netherlands)
Milling machine / router: Stepcraft D 840
3d Printer: Creality CR10 v2