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Problem

What grit for walnut before oil finish?

Walnut can show sanding scratches or look uneven after oil finish.

wood dry sanding scratches coarse grit
Answer

For walnut before oil, sand 180 then 220. Use 320 lightly only on visible face grain.

Why it happens
Oil finish highlights the scratch pattern, especially if coarse marks remain before finishing.
Recommended grit
Sand walnut through 180 and 220. Use 320 only for a lighter final touch on visible surfaces.
Wet or dry
Dry.
Success check
The walnut shows an even scratch pattern with no coarse lines before oil is applied.

What to do

  1. Sand evenly with 180 grit.
  2. Move to 220 and remove the previous scratch pattern.
  3. Use 320 lightly only on visible face grain.
  4. Remove dust before applying oil.
Avoid: Do not stop at 120 grit before oil finish on walnut.

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