Lesson 31-Wood Finishing

Preparing the Wood Surface:
1. Sanding-a way of smoothing the surface of stock with abrasive.
2. Repairing Defects
a. Pin Holes-commonly caused by small insects while big holes caused by woodborers.
b. Cracks & Checks-opening a long the grain of wood.
c. Dents-shallow depression caused by faulty hammering,faulty clamping or caused by falling heavy objects.
3. Applying Wood Stain
a. Water Stain-dissolve powder dye in water.It penetrates deeply & raise the wood grain.
b. Oil Stain-made by dissolving in oil.Much easier to use because it takes longer time to dry.
c. Spirit Stain-dissolve anilyne dye in alcohol.Difficult to apply because it dries up quickly.
4. Applying Wood Filler & Sanding Filler
a. Paste Filler
b.Liquid Filler-used on non-close grained wood.It is paste thinned turpentine.
c.Sealers-finishes used as the base coat to fill the pores of close grained wood.
5. Applying Varnish-a varnish is a finishing material to beautify & preserve wood because it is tough,waterproof & heat resistant.