Wood keys into the glassfibre much better!
Simple.
And its not just any wood its plywood. Which is in itself strong.
When sandwiched between a layer of glassfibre both sides it is very strong and light!
Lotus and other kit car manufacturers use that method in their glassfibre bodies.
Well they did as its mostly carbonfibre now.
I could use mesh and do in places but that is harder to hold to a flat plane whilst doing the first layer.