Plywood core in hatches

[Scott]

Guys
What are you using for core material in the deck and hatch rebuilds?????.....

I'm rebuilding the fuel hatch and the hatch forward of the console. I will use the old skins to put the new core in. The old core material was 6”x6”x1/2” squares of plywood ….. I’m not doing that but will replace with a solid sheet of some kind of plywood.

DH .... any insight into why they built the deck like this....or if anyone else knows...

Right now I’m going with marine grade plywood……but I have heard that plain old regular sheathing would work fine….but I've also heard that the resin may not adhere as well to this?? Any hints on what type/grade of plywood I should get???

I dont want to have to do this again....

Was also advised and have purchased Vinylester resin, mat and Biaxial cloth to do the job as I was informed this resin will bind better with the mat and form a stronger stiffer hatch…..

I originally wanted to go with epoxy but two separate individuals that work with the stuff said the epoxy would work (and cost buckets more) but they both independently said this would be a good route (we'll see about that esp after seeing Trayder's issues). They both sell epoxy and steered me away from it….at least for this application. One of the shops told that they have rebuilt many transoms using this method with great , lasting results