Disclaimer: I have never made a composite coaming.

The way I see it you have two options: 1) pick up a small quantity of fast hardener/resin. Get the ambient temperature in your shop up in the 70s and warm the epoxy and wood if you can. The fast mix will develop tack within a reasonable timeframe... and the fabric will stay in place. Another trick that helps is to paint epoxy over the parts first, then lay the fabric into the wet epoxy and then go back and paint epoxy over any dry spots; it tends to help the fabric stick for some reason.

2) Vacuum bag it. I figure it takes about $100 to get into vacuum bagging but I haven't done it yet Figure $60 for a Gast pump on www.ebay.com and $40+ for mastic, plastic, port(s), hose and pressure gauge... plus the time it takes to experiment, etc.

I hope this was helpful and good luck with it.

Chip
www.ChipSandresky.com