Preparation is the key to everything.
A perfectly prepped wood surface will provide a perfect finish.
How to prepare a wood surface for treatment
Wood surface must be clean and dry (moisture content max. 20%). Clean or slightly sand old microporous finishes, remove old varnishes/lacquers by sanding. Small cracks, larger dents and small holes in the wood can be filled with Osmo Woodfiller.
Sand carefully before application starting with a coarse paper – final sanding for flooring P100-150, furniture P180-240. Remove dust etc. thoroughly from the surface before application with a vacuum cleaner.
Step by step guidelines
Depending on the surface you may need to start with either a very rough or medium (P40 then P60 for removing old finishes – P80 for raw wood) sanding grit. It is important not to skip steps in grit whilst sanding. A drum/band sander should be used.
100 grit medium sanding paper using either a single disc or trio sanding machine or drum/band sander.
Filling of cracks, splits, knots and damage (if required) using Osmo Woodfiller (for up to 2mm in depth).
100 grit medium sanding paper or mesh using either a single disc or trio sanding machine.
120 fine grit sanding paper or mesh using either a single disc or trio sanding machine.
The surface will be very smooth, with a vivid optical character. You will be able to feel the direction of growth of the wood’s natural fibres. The surface will feel smooth along the grain and blunt against or across the grain. Always work with and along the wood’s grain to ensure perfect results.