Originally Posted by juzwuz  Would a mold made out of delrin or similar plastic work with vacuum bagging? |
You would have to check your mold material and make sure your resin would not melt into it. Epoxy is not likely to react to most things but gel coat (It is polyester resin based) Polyester resin, polyvynil resin and anything with MEKp hardner may eat up the mold.
Cut the mold of aluminum and polish it well and you will have no issues. The above post about cutting a part in foam (mold tooling foam, not cooler material) then laying up a mold on it with tooling gelcoat followed by several layers of fiberglass mat is the industry standard. When you have it thick enough just remove the master and polish the mold. Then it is ready to vacuum bag.
Here is a thread where i made a RC boat mold. It came out OK for a homemade mold.
http://www.modelpowerboat.com/forum/...read.php?t=186
JIM