Varnish is the most common wood floor surface treatment, favoured for its high wear resistance and low maintenance. Compared to oil and hard wax oil, varnish gives the wood a light colour, more consistent with natural wood.
Primer and topcoat
The floor is treated with two different types of varnish, a primer then a topcoat. The primer produces a well-bodied surface and emphasises the colour and structure of the wood. The topcoat provides durability and decides the gloss level of the surface.
Avoid direct sunlight on the floor, pull down curtains if you need to. Avoid any type of draft to ensure no particles "dry" in the wet varnish. Vacuum the floor carefully.
To apply you will need a good quality microfiber roller, an extension bar, brush and a container to pour the finish in. It is also good to have some paper and a plastic bag handy in case of spills, and somewhere to place the tools when you have finished.