Abstract: The present invention relates to a compound coating for wood comprising an alkyd resin undercoat and a siliceous coating applied on top of this undercoat. The alkyd resin undercoat may be obtained from a coating material comprising a long oil alkyd resin and a mineral component. The siliceous coating to be applied on top of the undercoat is obtainable from a coating material comprising water glass or a mixture of silica sol and water glass having a ratio of 5 to 30 mol of SiO2 per mol of alkali oxide and a mineral component.