Here is a picture of my FRS that has been waterless/rinse-less (depending on what I felt like doing) washed for 3 years, and polished once after the first year of ownership. Wouldn't wash it any other way. I use Optimum Rinseless Wash+Wax
The photo was taken after over 100 waterless/rinseless washes. Washed weekly and occasionally used a hose/pressure washer for the underside, wheel wells, and wheels.
65k miles