Sanding: Wood surface should be sanded to P80-P100 grit using a belt sander or similar, and all traces of old finish or paint must be removed. For exterior furniture P120-150 grit is suggested. Caution, we do not suggest using higher than P100 on decking as the surface may become slippery. Important: A pressure washer can significantly raise the moisture content beyond 20% and surfaces prepared in this manner must be allowed to dry for 2-3 weeks before applying finish. 1. If possible apply the first coat on all sides of the decking boards before installation 2. Use an Osmo 150mm Decking Brush to apply the Decking Oil thinly and evenly, along the wood grain 3. Allow 10 to 12 hours drying time, then apply a thin second coat as above. Dried surface is satin-glossy at first and afterwards is satin. Note: The finish may also be buffed into the wood, in thin applications using a non-abrasive white pad or microfibre applicator pad. Tip: The type and age of timber can have a dramatic impact on how much Decking-Oil you need. As an example, softwood decking that is old will likely require more oil than a relatively new hardwood decking that still retains a fair amount of natural oil. To test how much oil your deck needs, apply one thin coat, allow it to dry, then apply a droplet of oil in a corner. If the droplet of oil soaks into the wood then a further coat can be applied. Repeat this process until the droplet of oil sits as a bead on the surface of the wood and no longer soaks into the timber. This is an indication that the timber has absorbed as much oil as possible and doesn’t require any more. WARNING: Cloths saturated with product are a spontaneous combustion hazard and should be left out unfolded until dried, prior to disposal or preferably stored in a proper fireproof container.