Your profile says your a Mechanical engineer, so consider these issues whilst making your analysis
Your boat is not new, you do not know if any delamination is starting to occur between the Gelcoat and the GRP (glass Reinforced plastic.
The Gelcoat is not really an integral part of the structure and has no impact resistance whatsoever ( it does look pretty however)
If you get a bit of wood and laminate that to the Gelcoat and then fasten your cosole to the wood, then isn't this just a nother way of attaching to a non structural component!
It wouldn't happen in my world ( but then I am the first to admit that my world is a strange place)
I need a little bit of Rhythym and a little bit of Blues