1. After the new walnuts are obtained, it is necessary to peel off the green skin on the surface, and brush the green skin residue on the walnut surface with a wire brush or a hard brush.

2. At first, brush walnut oil or olive oil on the surface of walnut with a soft brush, which can promote coloring and prevent cracking.

3. After brushing oil, it is best to clean your hands before playing every day, and polish them with a bristle brush or a fine brush. When you don't play, keep them in a breathable plastic bag to avoid cracks caused by wind and excessive temperature and humidity changes. It usually takes 7-15 days to dry them in the shade.

4. After the walnut is dried, play and brush it for 1-2 hours every day, and then store it in a plastic bag. After repeated for 2-3 months, the surface of the walnut will change color and form a thin patina, and then it will rarely crack.

note: when playing with walnuts, try to reduce the number of times of using oil, so as not to cause blackness of walnuts, and at the same time reduce mutual friction to avoid serious texture wear. www.fylgdww.com