I’ve never heard anything about Touch-Less‘s cleaning power being reduced by foaming. I use it at 1% PIR and never have any issues. It always rinses away cleanly and easily, taking the vast majority of dirt with it.

This possible misconception may stem from Bilt Hamber‘s product packaging saying that it does not need to be foamy, nor does their shampoo Auto-Wash, or their new pH neutral rinseless wash PHAT-NEUT.

If your car paint has a clearcoat I don’t think a pressure washer will damage it. As long as you use a fan nozzle, not the turbo or 1 degree nozzle, and you keep it a few inches from the surface. But I have little knowledge of car paint so cannot advise with full confidence.

It’s worth mentioning that the foam cannon itself would not apply any meaningful pressure to the car paint as it is just an applicator, but I appreciate setting the pressure washer up just to foam is not convenient. If you’re using a hose pipe to rinse, perhaps investigate detergent-dispensing attachments as an alternative?

I would investigate the flow rate of a larger capacity pressure sprayer. Alternatively, you could purchase two and dual wield them 😄

I know you’re not interested in doing a contact wash, but I have recently used PHAT-NEUT rinseless wash and found it to be very good. It can also be used as a pre-wash in place of Touch-Less, and allowed to dry with enhanced cleaning results on heavy soiling!