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

1、所有新车必须底盘及车厢清，旧车有锈的地方必须铲除。

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.

化学清技术是利用清剂通过脱脂、酸除锈、钝化等工艺去除被清物体表面的污物或覆盖层。