Most places that give services to cars such as parking lots or car wash have a written statement that they are not responsible for damages or theft while using their facilities. The responsability...
yes you can... but i don't recommend it.EDIT: You should NOT get your convertible in a car wash it will ruin it... you better try interior & exterior steam cleaning
The biggest problem for a car wash business is that it uses too much water, some of the car wash business use steam cleaning as an effective alternate to using water all the way.