Here are all of us looking negatively at car valeting, but I recall getting involved in far nastier jobs than that.
Cleaning excrement off wall, Head inside greased up cookers, Neck ache from Ceiling tile cleaning, sewage flooding, Trauma blood scene, and car valeting. In the early days you take what work comes your way, it is only when you get more established that you can become more choosey what you take on.
Best of luck to you Alex
Regards
Robert