Hi SEAN been messing with coatings for many years. The biggest
worry on wood, is moisture. It can attack the glue that you labouriously
applied to the laminates. It can also destroy the balance of the
blades, if it does not penetrate evenly. Oils are nice for the look.
but have a life. Hydro-carbon oils live longer, but can attack glues.
My advice, such as it is, is to use an automotive type clear coat.
It is designed to last for years, in lots of wind, and lots of UV.
But the wood needs to be dry, and it will take several coats.
A light sanding between coats, for bond. A pain to do, but the
wood will be pretty, and you will have a durable surface. It can also
be recoated years down the line with just a light sand
Hope this was of some help
bj