Bark removed and edge also cleanly sanded. Cracks or holes are encapsured with transparent epoxy resin. Subsequently, the disc was oiled with a high-weight turner oil (suitable for children's toys). Dimensional tolerance +/- 2 cm.
Disc is professionally deposited and dry. Wood is a natural product.
Despite careful drying, cracks can form in the living area, so this is not a reason for complaint. This item is made of walnut.