The surface of the engine room should be chemical cleaned to remove oil and then spray one coat of alkyd enamel.机舱表面化学清洁除油,喷涂一度白醇酸磁漆.New steel plates must be shot blasted and then sprayed with one coat of inorganic zinc shop primer.新钢板必须进行抛丸除锈,喷涂一度无机锌车间...