Walnut is a wealthy, dark-brown hardwood that is nowhere near as common as it was, so when you’ve got a piece of walnut furniture, then you should protect it. Penetrating oil which hardens offers this protection while bringing out the best in the wood.
Organizing the Wood for Oiling
Apply oil simply to raw wood following opening the pores marginally by sanding. This does not require an orbital sander. Fold a sheet of 220- to 400-grit sandpaper in half and then do the job by hand, sanding with the grain of the wood. Wipe the sanding dust with a dry cloth, not a moist one; moisture raises the wood grain.
Apply Two Coats
Suitable finishing oils for walnut furniture comprise tung oil and boiled linseed oil. Both harden in the wood and seal the grain from moisture while leaving a muted, appealing sheen. It takes two coats to get the best finish — use each with a rag, rubbing with the grain. After the first coat dries, which might take three or four times, sand it lightly with 600-grit paper before applying another coat. A finish coat of non-silicone adhesive waste, buffed with a lambswool bufferthat provides the finishing touch.