Finishing Techniques

• What is the purpose of using mineral spirits on metal surfaces?

  To remove grease before finishing
• What is the first step in preparing metal surfaces for a finish?

  Remove grease with mineral spirits
• How is plastic dip coating applied to steel items?

  Heat the item, dip in fluidizing tank
• What happens to the steel item during the plastic dip coating process?

  It is heated and then dipped in polythene powder
• What is the most common way to protect steel from rusting?

  Painting
• What is the first step in the paint process for steel?

  Abrade the surface to make it smooth
• What is the purpose of applying a primer in the painting process?

  To grip securely to the surface
• What is galvanizing?

  Applying a protective zinc coating to steel
• What is the common method of galvanizing?

  Hot-dip galvanizing
• How does galvanizing protect steel or iron?

  Zinc coating prevents corrosive substances
• What is polishing?

  Creating a smooth and shiny surface
• What happens to an unpolished surface when magnified?

  It looks like mountains and valleys
• What is the process of polishing with abrasives?

  Start with coarse, then use fine abrasives
• What are the main options for finishing natural wood?

  • Paint (Emulsion)
  • Paint (Gloss)
  • Polyurethane Varnish
  • Wax
  • Staining
• What is the process for applying paint to wood?

  Prime, then apply two coats of paint
• What is polyurethane varnish used for?

  To provide a clear, waterproof finish
• How is wax applied to wood?

  Seal the wood first, then apply wax
• What does staining do to wood?

  Changes the color while showing grain
• What is the purpose of the polishing machine?

  To polish soft metals and plastics
• How should polish be applied when using a polishing machine?

  Apply to the rotating mop before use
• What should be done before polishing on the buffing machine?

  File to remove scratches and smooth surfaces
• What is the correct way to hold work against the polishing mop?

  Hold firmly and move back and forth
• What can happen if the top corner of the work is caught by the mop?

  It can fly out at high speed
• What is a dangerous way to hold work against the polishing mop?

  Holding it at the top corner
• What are the steps involved in the painting process for steel?

  1. Abrade the surface
  2. Degrease with solvent
  3. Apply primer
  4. Apply finishing coats
  5. Sand between coats if hand brushing
• What are the steps involved in the polishing process using a polishing machine?

  1. File to remove scratches
  2. Use wet and dry paper or emery cloth
  3. Apply polish to the rotating mop
  4. Press material against the mop
  5. Move material back and forth