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Timber Surface Treatments and Finishes

Bare wood soaks up water, wears down and rots. Meet the finishes that protect and beautify timber, from paint and varnish to oil, wax, shellac and veneer, and learn to say WHY you would choose each one.

⏱️ 15 min 🎯 13 activities Teachers Not yet rated Students Not yet rated

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What you'll cover

Why finish timber? 🪵

Bare timber soaks up **moisture**, picks up dirt, **wears down** and can even **rot**. A surface finish **protects** the wood, improves how it **looks**, or does both. This module covers the main timber finishes and, for the marks, **why** you would choose each one.

The language of finishing 🔑

Four ideas run through the topic:

Spot the protective reason 🛡️

Which of these is mainly a PROTECTIVE reason for finishing timber?

  • Sealing the wood so it resists moisture and does not rot
  • Adding a bright colour to match a room
  • Showing off the natural grain pattern
  • Giving the wood a glossy, decorative shine

Match each finish to what it does 🔗

  • Paint
  • Stain
  • Varnish
  • Oil
  • An opaque coloured coat that hides the grain and both protects and decorates
  • A colour that soaks in and lets the grain show through, mainly for looks
  • A clear, hard protective coat that shows the grain and resists moisture
  • Soaks into the wood for a natural, water-resistant, low-sheen result

Protect, decorate, or both? ⚖️

Most finishes lean one way, though several do both. Knowing the lean helps you pick one and state a reason.

Which are mainly decorative? 🎨

Select the TWO finishes used MAINLY for decoration.

  • Wood stain, which adds colour while showing the grain
  • Shellac, a high-gloss traditional French polish
  • Exterior varnish on a garden gate
  • Oil rubbed into a wooden chopping board

Complete the finishes 🧩

A finish is applied to timber for _____, decoration, or both. _____ gives an opaque coloured coat that hides the grain, while a _____ adds colour but lets the grain show. A clear, hard _____ mainly protects and still shows the grain. A thin layer of attractive wood glued to a cheaper base is called a _____.

protection paint stain varnish veneer decay wax oil shellac grain

Name it, then justify it 💡

For full marks, do not just name a finish, say **why**: is it for **protection**, **decoration**, or **both**? For example, an outdoor bench needs **varnish or oil** for water protection, while a jewellery box suits **shellac or wax** for decoration. **Veneering** is different: instead of a coating, a **thin sheet of attractive or expensive wood is bonded to a cheaper board**, giving a costly look at a lower price.

Apply a finish 🪜

An interactive activity.

Choose the right finish 🪑

An interactive activity.

Protect, but show the grain ✨

A designer wants a finish that PROTECTS an oak table from spills but still lets the beautiful grain show. Which is the best choice?

  • Varnish, a clear protective coat that lets the grain show
  • Paint, an opaque coat that hides the grain
  • A wood stain on its own, which mainly adds colour
  • Leaving the table completely unfinished

Spot the true statements 🖍️

An interactive activity.

Recommend a finish ✍️

An interactive activity.