If you use a pressure washer to wash truck fleets you may want to look in to this certification program
Here is an excerpt from the flyer
Spring has come early for most of us and power washing work has begun. The PWNA is offering an opportunity for you to get a step above your competitors by becoming PWNA Certified in Fleet Washing. PWNA instructor Paul Horsley will be holding the certification April 5 & 6, 2012 in Calgary, Alberta (Canada).