Simoniz Rinse Off Wax
Price: £5.99 for 500ml
Like some rivals here this switches around the wash and wax process. Looking like a liquid polish, you apply to the whole car after washing. Once covered rinse the water-activated wax before drying eliminating the need to buff to a shine. Despite the name, a fair amount of wax remains, rapidly clearing water at first before slowing, although still working, at the end.