Finishing techniques Flashcards
(12 cards)
How is metal prepared before applying a finish?
Clean to remove grease and dirt
Remove rust or oxidation
Smooth surfaces using files and abrasive paper
Apply a primer if needed
How is wood prepared before applying a finish?
Plane and sand the surface smooth
Remove dust and dirt
Fill holes or imperfections with wood filler
Apply a primer or sealant if required
How is plastic prepared before applying a finish?
Remove protective film if present
Smooth edges and surfaces using files and abrasive paper
Clean to remove dust, grease and static
What are the three main reasons for applying finishes?
Function: to protect from damage, wear or corrosion
Aesthetics: to improve appearance
Environment: to resist weathering or chemical attack
Why is metal painted?
To protect from rust and corrosion, improve appearance and sometimes identify parts.
What is metal polishing used for?
To create a smooth, shiny surface that improves appearance and reduces corrosion.
What is dip coating?
A process where metal is heated and dipped into powdered plastic, forming a protective, decorative coating.
What is galvanising?
Coating steel or iron with a layer of zinc to protect it from rust. Commonly used on outdoor metalwork like fences and bins.
Why is wood painted?
To protect the surface, improve appearance and sometimes add colour.
What does varnishing wood achieve?
It protects the surface while allowing the natural grain to show, improving durability and appearance.
Why are preservative stains applied to wood?
To protect against rot, fungi, insects and weathering, especially for outdoor use.
How is plastic finished?
Mainly through polishing to remove scratches, improve appearance and produce a smooth, glossy surface.
