floor board varnish

See the 'Any other halberg Rassy owners out there' thread just a few below yours. The lacquer I recommend is superb for floors and extremely hard wearing.

It was the original finish (by Westerly) on the floors, lockers and bulkheads from new. With the couple of coats I've added in the last twenty odd years, after sanding down, the floorboards still look like new.

It's only available in minimum 5 litre cans (with hardener) so it may be too great a quantity for what you envisage.
 
Top