Fred is obviously very talented with Polyester and fiberglass.
But if you want a simple way of gluing plywood, or hardwood blocks to fiberglass, you can simply use a one part polyurethane like 3M 5200. This bond will be stronger than the wood or the fiberglass and is as easy as squeezing it out of the tube. The wood can still be soaked up with resin or glassed over later if desired. Another good choice is Marine Tex epoxy. It is a two part white putty that also bonds stronger than the wood or the fiberglass.
Here's a link the the 5200:
I used a lot of this on my fiberglass boat to mount bulkheads, cabinets, or wood blocks to screw into. It retains a bit of flexibility, so you can glue the edge of a bulkhead to the hull and not have too much of a hard spot that adds extra stress.