how to scare off rats

This i learn t while hanging around @ car workshop. An old uncle was complaining rats were always seen resting on his car engine bay, and he was pissed of the mess they made ( mostly shit).

Then this car repair man went to bought scrubs. Those Chinese kinda scrubs. And then the foreman tied it into each corner of the car's engine bay. And he guaranteed, no more rats.

installed about 5 of the scrubs.

I dunno man. Is this suppose to work? maybe i can install each on my sports rim so that those damn strays don't anyhow pissed on me wheels! haha. Never try, never know.