out of curiosity, search online, seems not safe for car/roof

good for deck/driveway and maybe for siding

https://www.consumerreports.org/pressure-washers/surfaces-safe-to-clean-with-a-pressure-washer/#:~:text=Pressure-Wash%20It%3F-,No.,garden%20hose%20and%20soapy%20sponge.

所有跟帖： 

• 这个顾虑也有过。直到看见专业洗车的人在用。问了后知道距离和喷嘴是关键。就像切菜刀一样，能切掉手指，大家还在用。 -PrimeryColor- ♀ (0 bytes) () 05/02/2021 postreply 06:47:51

• 对。会用的绝无问题，不会用的连启动都不会 -chinomango- ♂ (92 bytes) () 05/03/2021 postreply 11:02:22