[bigeasy1]

My 74 23 Tsunami had a transom plywood thickness of 1-3/8".
I replaced it with two layers of 3/4"marine plywood glued together with epoxy resin thickened to a mayonaise consitency with cabosil.

The finished thickness now,including the inner and outer glass,is 2-1/8".

I used about 3/4 gal of epoxy to glue the plywood together.I'm using polyester for the rest of the project.which incuded the inner transom skin.

I don't remember how much polyester resin i used in the transom alone,but so far i'm up to 11 gallons,and i've done the transom, engine beds,(it's an i/o), recored two hatches, and recored a portion of the deck that was rotted.

I've also used about five gallons of hull and deck putty,that i get from Mertons Fiberglass.
It's a super polyester putty thats very strong,and is great for making a radius on sharp angles,where youre tabbing in,
bedding in cores, filling and fairing low spots,etc.

Not sure how much paint it will take to do a 23,but i think i'm pretty sure that i'll be using a two part urethane.