[gofastsandman]

Bushwacker helped 65 Bowrider , whose dad designed the darn thing, with their transom on the top secret offshore racer 21. They did their homework with no assumptions.

Having said that, I`m an old surfer and will help you out.
Scuff the Coosa w/ 80 grit to give good tooth. Make a "flash" batch of poly. Mix up a pot of resin and mek and thin w/ acetone to the consistency of water. This allows max penetration and bond strength. Now you want to "hot coat" the lay up. Poly has to gas out in between layers. Do all 4 in a day for proper and strongest bond! Let the first layer of poly get to the point of still being tacky. Wipe with acetone to reflash the 1st coat of resin. Now make a regular batch of resin and start the layup. Allow all layers to gas out to the point of being tacky, wiping w/ acetone between each layer. Wear gloves when playing w/ mek!!!!!!! Poly + acetone + beer= wasted. Wait til your almost done for your proper reward. Been there done that.
GFS