Rinse with hose
TBM for cleaning using wash mitt & shampoo of your choice
Rinse with open ended hose
Dry using drying towel
Very, very basic but that's the idea. By the way, TBM = Two Bucket Method, one bucket with your warm water & shampoo in, and one with cold clean water to rinse mitt before loading up with shampoo water again. One panel at a time, i.e. load mitt, clean bonnet, rinse mitt, load mitt, clean bumper, rinse mitt etc.