Parking lot and garage cleaning starts with identifying problem areas — oil stains, tire marks, and high-traffic zones typically need pre-treatment with a degreaser before pressure washing even begins, since standard cleaning alone won't fully lift embedded fluid stains. The process uses commercial-grade pressure and volume to cover large surface areas efficiently, with careful attention around painted lines, curb markings, and signage to avoid stripping paint along with the dirt. Proper water containment and runoff management are especially important on these jobs, since oil and cleaning chemicals need to be handled responsibly rather than washed straight into storm drains. For garages specifically, ventilation and drying time matter more than on an open lot, since enclosed spaces hold moisture longer and need to dry fully before the space reopens to regular use.