New car should be clean, and the old car should be derust before working.

1、所有必须底盘及厢清干净，旧有的地方必须铲。

BlueStar cleaning technology uses BlueStar series of cleaning agent eliminate the dirt and cover on the object surface by the technique of degrease, derust and passivation.

星化学清技术是利用星系列清剂通过脱脂、酸、钝化等工艺去被清物体表面的污物或覆盖层。