Want to bring your outdoor wooden furniture back to life? As a DIY expert with years of hands-on experience restoring garden structures—a trick I learned from my handyman grandfather—I can confirm that harsh weather quickly grays and blackens exposed wood. No need for expensive tools like a Kärcher.
This proven method uses sodium percarbonate and linseed oil to clean, neutralize, and protect. Here's how:

- Sodium percarbonate
- Linseed oil
- White vinegar
- Wide brush (or whitewash brush)
- Brush with hard fibers (coconut for example)
1. In a bucket, pour 1 part percarbonate to 10 parts warm water.
2. Mix well.
3. Apply this mixture to the wood with the brush.
4. Wait 20 minutes for the product to work.
5. Then scrub the wood with the hard brush.
6. Rinse thoroughly with water.
7. Wait for the wood to dry.
8. Now mix equal parts vinegar and water.
9. Apply this mixture to the wood with a damp cloth.
10. Apply linseed oil to the wood with another cloth.
There you go—thanks to this homemade wood restorer, your garden furniture looks brand new! Easy, fast, and highly effective. Say goodbye to moss, lichen, fungi, greasy stains, or tannin buildup.
This treatment not only revives the wood but also protects it from future weather damage, extending its lifespan. It's a natural, eco-friendly alternative that delivers professional results without bleach or pricey equipment. The vinegar step neutralizes residues for safety. Perfect for garden furniture, outdoor tables, decks, fences, or cladding.
You can replace sodium percarbonate with soda crystals (2 volumes soda crystals to 10 volumes lukewarm water). Note that soda ash will whiten the wood more than soda crystals.