Steve:
No problem.
I know that over 100 customers didn't lie to me. It's true that some did spray, with a fan jet, vs. the cone jet we taught, but it wasn't the predominant way it was done.
They used a shower- feed brush, connected to a rotary scrubber with a solution tank. And it was essential that they overlapped precisely and consistently to get an even job. They had to do the corners of a room separately and by hand, which they really didn't like and wanted a better way to do. And they had to scrub the rooms vertically as well as horizontally when dyeing.
Many of the ones I dealt with "tinted" on most jobs. They considered it that routine... and the considered it to be a marketing advantage.
Later, they tried a new design that used brushes that were on rollers, and it was a disaster aggravated by a design flaw that slung the solution up and into the drive motor. It was touted to be faster and better, but was neither. And the franchisees who had them, shelved them, either going back to rotary, or bucking the system entirely and going to truck mounts.
Premium and Super Premium Shampoo, BTW, were actually "shampoo", in that they contained SLS. They had a fragrance in them that was unique and sort of a very sweet lemon, or lemon - bubblegum. If I remember correctly, the difference between the two was how concentrated they were. (We copied it way back then and sold it by the bucket at a lower price than Waco did.)
They also had, "Dye Shampoo".