Hmm spraying their rooms before going in huh? I'm just messing with ya I knew you meant to say "Rims"I have them on all 9 of my Laserwash 4000's. It didn't drive sales, but it does do a good job on the wheels and rocker panels. We use to have most of our customers spraying their rooms before going in. Now almost none spray their rims, they just buy one of the washes with the wheel cleaner.
I simply programed for the wash to do the undercarriage with rust inhibitor. Then rather than plumbing from the rust inhibitor solenoid to the high pressure pump, I plumber out to the bay.