Working with spalted wood
Working with spalted wood can be incredibly rewarding—but it comes with a few quirks that can catch you out if you treat it like regular timber.
What makes spalted wood special?
Spalting is caused by fungal activity, which creates those striking black lines (zone lines) and sometimes pale or marbled areas. Common New Zealand timbers like rimu or beech can develop beautiful spalting if conditions are right.
The challenge: softness and stability
The same fungi that create those patterns also begin breaking down the wood. That means:
Some areas may be soft, punky, or crumbly
Structural integrity can be uneven
It may tear out easily when machining
How to work with it successfully
1. Stabilise first (if needed)
If the wood feels soft:
Use a penetrating stabiliser like epoxy or CA glue
For small items (like crochet hook handles or boxes), thin CA glue works well
Let it fully cure before sanding or cutting further
2. Keep tools razor sharp
Dull tools will tear fibres instead of cutting cleanly. Whether you're turning, carving, or planing, sharp edges make a huge difference.
3. Take light cuts
Avoid aggressive passes. Spalted wood rewards patience—slow, shallow cuts reduce tear-out and preserve detail.
4. Sand carefully
Start finer than usual if the surface is delicate
Use a backing pad to avoid digging into soft areas
Consider wet sanding with oil to support fragile fibres
5. Seal and finish well
Spalted wood really comes alive under finish:
Oil finishes (like Danish oil) enhance contrast
CA or resin finishes give durability for functional items
Wax can be used for a softer, natural look
6. Safety matters
Spalting is fungal, so:
Wear a dust mask or respirator
Avoid inhaling fine dust when sanding
Best uses for spalted wood
Because of its visual appeal (and sometimes reduced strength), it’s ideal for:
Decorative boxes (like your crochet hook boxes)
Turned handles
Inlays or feature panels
Jewellery and gift items
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