Haven't washed or waxed the car since mid-April. Drive 13 miles each way work and back daily, park in parking lot with hundreds of other cars near an airfield. Looks pretty good!
http://www.the370z.com/attachment.ph...1&d=1345161250
When I ordered a CoverKing windshield sunshade, I received a free auto brush. Has some sort of wax impregnation. Just brush the car every 5 days or so, dirt comes off, and not much seems to stick to the slick surface left. Working fine so far.