Hi again,
thinking ahead now, I am laying recycle cyprus pine on hardwood joists and bearers on a 66 m2 deck using SS 50 mm 8 gauge screws.

Some of the wood was previously treated with water based polyurethane and it looked a treat. Some of the wood is not treated at all.
I would like to sand the floor then apply something that would display the natural qualities of the wood and preserve it against the weather.

Can someone recommend a/some products.