Sonic Foam System - Screwdriver and Socket Set 1/4" - 141 Pieces - 29" (XD) D/C by OG Hose Bib > 3/4" Female

Hose Bib > 3/4" Female GHT Coupler > 3/4" Male GHT Plug > 3/4" Female GHT to 3/4" Female NPT > T316 Stainless Bucket Filler Hose > T-304 Stainless Elbow (THIS PART) > Brass 3/4" Male NPT to 3/4" Male GHT > 3/4" Female GHT Coupler > 3/4" Male GHT Plug > Pressure Washer Inlet

You could use something like McKee's 37 N-914 diluted in a spray bottle as lubrication to aid in wiping

this wand has an integrated QD plug on the inlet

It dispenses from the top as a foam

Sonic Foam System - Screwdriver and Socket Set 1/4" - 141 Pieces - 29" (XD) D/C by OG Hose Bib > 3/4" FemaleThese are the tools I've decided to use at OGHQ, they have a nice quality to them with good ergonomics. They aren't intended to replace everything but there is a great variety of tools offered here. For the price, you cannot beat them vs something that's 2x or 3x the cost like Snap On.