Hi all, 
I have a question about mould making for vacuum infusion.
I have model of a helmet I want to make and I would like to make mould of wood.
I would mill the wood and get the shape of mould like the helmet. 
Do you think this is good idea, if not, what is better solution?
If this is possible what kind of coating do you recommend on top of the wood so i get the best possible surface quality?

Thanks