From the page: Rust is hidden ink
Idea 6
Sawdust + glue filler paste
Woodworkers of old never threw away the sawdust from cutting — mixed with glue, it became a paste for filling holes, cracks and hidden nails, with the advantage of matching the color of the very wood of the piece. It's a humble (and cheaper) relative of commercial fillers, and it works on the same principle: fine particles + binder = a moldable solid that dries hard.
What you need
- Fine sawdust from the same wood (or sanded from a similar piece)
- White glue (PVA) or wood glue
- Spatula or old knife
- Fine sandpaper
- Small container for mixing
How to make it
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1
Mix sawdust with glue until it becomes a dense paste, like thick dough — start with little glue; it's easier to thicken than to thin.
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2
Press the paste into the hole or crack with the spatula, pushing it well in so no air pockets remain.
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3
Level with a ruler or spatula flush with the surface — it will shrink a little as it dries, so leave it slightly above.
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4
Wait for it to dry completely (a few hours, depending on thickness).
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5
Sand until level and invisible with the rest of the piece.
Finishing touches
If the piece will receive the iron mordant, apply the filler first — it darkens along with the wood and the patch stays uniform. It's the perfect finish for repairs on pallets, benches and crates.
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