Wood Finishing

1
Wood Finishing
2
Wood Finishing

• What is wood finishing?
• Why do we finish wood?
• What are the steps to achieving a good finish?

3
Wood Finishing

• Two steps to wood finishing
• Sanding
• Applying a chemical protectant (finish)

4
Sanding

• Why do we sand the surface and edges
• To remove machine marks
• Smooth surface for good feel
• Promote adhesion for finish

5
Sanding

• Removing Machine Marks

6
Sanding

• Making the wood smooth

80 Grit
120 Grit
7
Sanding

• Sanding should be done in at least three steps
• 80 Grit (sub 100)
• 150 Grit (sub 120)
• 220 Grit (sub 180)

8
Abrasive Paper
40 gr, 80 gr, 150gr, 220 gr, 600gr
9
Sanding Tips
Dont Quit too Soon (see machine marks)
Sand with the grain
Dont apply finish before 180 grit (see sander
marks)
10
Sanding Tips

• Raising the Grain
• Final Step before applying finish
• Raises the last tiny fibers so you can sand them
  off

11
Chemical Protectant

• Wood is a porous absorbent material
• Without finish it
• Discolors
• Shrinks
• Swells
• Warps

12
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