دليل تشطيب الخشب: الورنيش والزيت والدهان

Which finish?

How much do you need?

Area = length × width × number of surfaces
Litres = area × coats / coverage (m²/l)
Buy = litres × (1 + margin%)

Typical coverage: varnish/paint 8–12 m²/l, stain 8–15 m²/l, oil 10–18 m²/l per coat.

Worked example

A tabletop 1.8 × 0.9 m, 3 coats of varnish at 10 m²/l, 10% margin:

Area = 1.62 m²
Litres = 1.62 × 3 / 10 = 0.49 l
Buy = 0.49 × 1.10 ≈ 0.54 l → buy 0.75 l

Application tips

• Sand to 180–220 grit, remove dust, then finish.
• The first coat absorbs more on raw wood — budget for it.
• Sand lightly between coats with 320 grit.
• Oil: apply generously, let it soak, wipe the excess.

Use the wood finish calculator to size your can before buying.