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Published byStephen Dowsett Modified over 10 years ago
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Wood Finishing
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What is wood finishing? Why do we finish wood? What are the steps to achieving a good finish?
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Wood Finishing Two steps to wood finishing – Sanding – Applying a chemical protectant (finish)
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Sanding Why do we sand the surface and edges: To remove machine marks Smooth surface for good feel Promote adhesion for finish
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Sanding Removing Machine Marks
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Sanding Making the wood smooth 80 Grit120 Grit
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Sanding Sanding should be done in at least three steps – 80 Grit (sub 100) – 150 Grit (sub 120) – 220 Grit (sub 180)
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Abrasive Paper 40 gr, 80 gr, 150gr, 220 gr, 600gr
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Sanding Tips Sand with the grain Dont apply finish before 180 grit (see sander marks) Dont Quit too Soon (see machine marks)
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Sanding Tips Raising the Grain – Final Step before applying finish – Raises the last tiny fibers so you can sand them off
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Chemical Protectant Wood is a porous absorbent material Without finish it: – Discolors – Shrinks – Swells – Warps
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Chemical Protectants There are many different finishes, however there is usually a best finish available for a given application. – Stain, Oil, Wax, Shellac, Varnish, Lacquer, Paint, Enamel, Epoxy and Polyester Resin, and Water- Based Finishes (low VOC) – Applying Finish Applying Finish
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