Now I worked for the company for 5 years

but I can definitely recommend the Septone truck washes. TW20 for a standard truck wash and TW22 for a wash & wax. Doesn't strip and is free rinsing, so if it does dry on the surface it will wash off as soon as you apply water.
I washed my company car with the TW22 then, and have continued to use it on the current company car, the Pathfinder and the Jayco, no issues. Doesn't replace a good polish but will prolong the time between polishes.

Mark.