If the finshed parts are made of fiberglass I would make the mold out of fiber glass. You need a very good (smooth) finish on the part you use for the plug that makes the mold. Below is a link to molds I made for tip tanks and rocket pods.
Sid
Last edited by sidgates; 04-08-2018 at 03:46 PM.
Reason: Wont let me send link , will try to sent in PM