As the title. I took a look at the tags and didn't see one for it that I could find. While washing motor vehicles does tend to be a bit more unique than washing other things, it's not really dealing with any mechanical aspects of the vehicles in question. So, I thought I'd ask.
Would questions about car washing or detailing be on-topic?
Edit: I did my tag searching against car-wash and wash. After asking this, I discovered that the detailing tag does exist. So perhaps a better question is if we should create a car-wash tag and have it be a synonym for detailing. I would think the more casual user would more likely search for "car wash" while car enthusiasts may instead search for "detailing".