If the problem is the nuisance caused by people constantly repairing cars in the garage then cite those people for the noise, visual pollution or whatever is actually causing the nuisance.

It's like those people saying cannabis should be illegal not because cannabis it's a problem per se but because it gives the authorities a pretext to stop people, look for unregistered weapons and otherwise help with their investigations. I get that the job of the police is hard, but that's how it's supposed to be.