This is probably more than I should admit to (OCD reference) but, yes, I use my pressure washer sometimes. Mine has a siphon hose to pick up cleaner and mix it with the water.
First, I pressure wash from the inside outwards. I mean that I get the whole inside clean from under the front and rear of the car.
Second, I roll the car back about 15 inches and do from the inside again. (to clean what was the topside of the rim)
Third, I clean the rims from the outside (visable side) spraying in towards the center of the car.
I use a mix of Arm & Hammer laundry detergent and water siphoned into the power washer, but, my washer is only good for about 1500 psi
I only do this when the inside of the rims are dirty enough to bother me
