Woodworking finishes, food-safe natural oils
Tung oil, raw linseed, hardwax oil, beeswax. What we used on the Madera wallets, what we tested and rejected, and what we would still recommend for small craft work that goes into pocket carry.
The brief for a wallet finish
A wallet finish has to do four things. It has to seal the timber enough to resist sweat and skin oil. It has to leave the timber feeling like timber, not like plastic. It has to be safe to touch all day, including by people who handle food after handling the wallet. And it has to be repairable, because pocket carry wears finish faster than shelf life. A film finish like polyurethane fails the second and fourth tests. A penetrating oil finish passes all four if it is the right oil.
Pure tung oil
Pure tung oil (the actual seed oil from Vernicia fordii, not the hardware-store blends labelled "tung oil finish") was the base of our production finish. It cures by oxidation rather than evaporation, penetrates the timber, and leaves a soft, low-sheen surface that feels like the timber itself. It is food-safe once cured. It takes seven to ten days to fully cure between coats. We applied three coats, sanding lightly with 400 grit between each, and cut the final coat with citrus solvent for a thinner application. It is slow but the result is unmatched at this scale.
Raw linseed oil
Raw linseed oil was tested and rejected. It cures slowly, attracts dust during the cure, and goes mildly rancid in pocket carry within twelve months. Boiled linseed contains metallic driers (cobalt, manganese) that we did not want on a piece that would sit next to skin all day. There are food-safe boiled linseeds on the market now in 2026 that did not exist in 2014, but we never moved to them.
Hardwax oil
Hardwax oil (Osmo, Rubio Monocoat, Whittle Waxes locally) was the serious contender against pure tung. It cures faster, is more durable on flat surfaces like flooring and tabletops, and is genuinely food-safe in the cured state. We rejected it for the wallet line for two reasons. The first is that hardwax leaves a slightly more plasticky feel than pure tung at the thickness we needed. The second is that hardwax is harder to repair locally if a wallet gets scuffed. For furniture, hardwax oil is the right answer; for a wallet, it was not.
Beeswax
Beeswax was the second component of our production finish, melted into the final tung oil coat at roughly twenty percent by weight. The wax adds a small amount of water resistance and gives the timber a warmer surface feel. It also lets the wallet take a quick refresh coat in the field: a fingertip's worth of pure beeswax buffed in by hand restores the surface in about thirty seconds. We sourced the beeswax locally from an apiarist in regional NSW.
What we would still recommend
For a small studio working in pocket-carry pieces, the tung-and-wax combination is still what we would point at. For furniture in any size, hardwax oil. For floors, hardwax oil with regular maintenance coats. For cutting boards and butcher blocks, pure tung oil cut with citrus solvent for the first three coats, then a mineral oil and beeswax maintenance regimen. None of this is exotic and most of it has been the working answer for fifty years.
Where it sits on a Madera piece
Every wallet that left the Sydney workshop between 2014 and 2017 went out under three coats of pure tung oil and a final tung-and-wax top. If you still own one and the surface feels dry, a single coat of beeswax buffed in by hand will bring it back. Pure tung oil is harder to find in retail than it was in 2017, but the mineral-oil-and-beeswax butcher block conditioner sold by most hardware stores is a workable substitute for a refresh.