A Photo & Discussion Forum for Wharram Design Enthusiasts
Mould is an every day plague for me as it thrives in this pemanently damp environment. First you'll need to wash it usually I just use a mild bleach solution and I mean mild as strong bleach will break down the fibers in the wood. You can also buy a mold and mildew remover but most of these are pretty much a mild form of bleach. The down side is it will lighten the wood so if you're looking for a varnish finish use white vinegar which works about 80% of the time but isn't as effective.
Next you'll have to lay the sheets as flat as possible and leave in a room with a dehumidifier make sure you get rid of any residual damp as this can affect the epoxy.
Good to see your progress, I'm holding off any further work until after the wet....
I wouldnt use bleach or vinegar on a surface that your going to apply epoxy to you may get an adverse reaction from any residue left on the surface. Try acetone instead it will certainly kill the mould.