Hi,
For structural and aesthetic purposes I'm planning on carbon skinning the deck of my sailing dinghy. The deck is currently marine ply.
However, I wondered if I could take the opportunity to do some weight saving at the same time by drilling a series of large holes out of the play before skinning.
If I do this, how can I skin? Can I cover the holes with something light such as vinyl or masking tape prior to skinning? Will this be enough to support it whilst it cures without showing imperfections? Will the bonding to the remaining ply be sufficient?
OR is there a specialist product that can be used to bridge the holes before skinning?
I have attached a (very) rough sketch to give some idea of what I'm talking about.
Many thanks in anticipation.

Thanks for the reply. I fear I may not have described the final outcome I want properly. I don't want any holes in the carbon skin, only in the plywood below (and that's purely to save weight)