mold making problem

[7521ply]

Let me start off by saying this site and the people on it are amazing! You all do some of the best restorations on boats that I have seen. I am restoring a 21' glasply, its a local boat from the pacific nw, sorry not a csc. I hope you all dont mind me posting on here, but from what I see this is the best place to go for the answers I need. I have replaced my transom with 1.5" coosa, built fiberglass foam filled stringers and am now working the back deck. I built a mold with mdf sprayed with duratec sanding primer, waxed it several times then another few coats of duratec followed up by a layer of chop and 1708 using poly resin. my problem was the duratec dried fast and as I was glassing it, it started to bubble the primer and lift it from the mold. I could not roll it out it would pop right back up. What happened? When you all do your layups do you wait for the duratec to dry or lay it up wet? any input would be great, I have several other molds I want to make and if I cant get this right its not going to be worth the time building the molds. Here are a few pictures to help show what happened. Thanks Josh

I hope this pic works!



If you all want more pics of the mold or boat let me know thanks again