Hi giddyup
I have been following your thread with keen interest as I am in the process of restoring a punt style aluminium boat for future crabbing. It was actually my father's last boat so there is a sentimental aspect to this project. You mentioned in a previous post that you used an epoxy sealant to coat the plywood floor before placement. I am at the stage of fitting the plywood sheets during lockdown 3 and am researching possible products for this purpose {Norseal epoxy wood treatment and International Everdure are listed online). I am hoping that you might be willing to nominate the product or trade name that you used to preserve the plywood. I only have experience with furniture grade preservatives such as Danish or decking oils and carbothane products which would not be suitable for marine use. It will have to be simple to apply as I am a crap painter. Thanks for any advice in advance. Cheers SS