To late to help you out now, but there is a waterless wash and wax I use. You can buy 32oz bottles, but the best price is the Aquanil-X Concentrate 1 Gallon (will make 10 gallons). Works great on counter tops, glass, mirrors, wood cabinet, eye glasses, plastic, Montana's, etc.
http://croftgateusa.com/buy-croftgat...ss-car-washing
Here is a picture on my 11 year old truck, which had only been wax 3 times in 10+ years. I started using the Aquanil-X in March 2012 and have clean it 5 or 6 times since with the Aquanil-X. Really easy to do, just spray on, wipe to cover the area, which cleans the dirt off, then easy buff with another micro fiber cloth.
The black is plastic. Compare the truck in the tag line with above.
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