When an ordinary cloth is used to rub grease off the glass , the grease becomes an additional coating with varying thickness 当使用普通布块擦抹玻璃上的油垢时,油垢会形成另外一层不同厚度的膜层。
If the required paint film thickness has not been achieved , the additional coats should be applied till the specified thickness is attained 如果未达到要求的湿膜厚度,应覆涂直到满足指定的湿膜厚。
If necessary , holes , seams and edges , where painting is difficult , should be given a stripe coating and additional coating with brush prior to airless spraying 必要时,在难以涂装的孔、缝或边缘处。应在正式喷涂之前进行预涂。