@@AdamJames. I use a little bit of transmission oil for the final contact wash. It’s good to give it that mirror finish. On a pre-wash, I add a little bit of brake parts cleaner to free up the dirt and debris 🤣😂
The internal orifice just needs to be swapped to a 1.1mm from the standard 1.25mm, as far as car foam concerned, recommend chemical guys honey dew, adams car shampoo, adams mega foam, make sure to dilute em all, gl