im in the look for new ways to wash flleets, i been in the business for 9 years and im finally tired of brushing all truck surfaces, it takes my guys eight housr to wash 53 units: trailers and single can trucks and reading some posts im giving away my profit. So the big question is how to dilute a brushless chemical to different ratios when using a down streamer injector.. Like i said before we do two stepping for truck frames and tire wells, but thats about it. im afraid to damage the glass with HF. I was thinking of two sur-flows pumps one for acid and one for soap and then rinsed off with DI but my mixture has me lost.