Thanks guys. I'm thinking I'll give both diluted Rinseless Wash (maybe slightly more concentrated then 16:1) and car soap in some sort of foaming sprayer (one of those pump action sprayer maybe) and see which works best.
My normal wash is a standard 2 bucket with a garden hose. But I'm wondering if there is a Adams product that I can spray on the front end (bug guts) and lower door/rocker panels (more heavily caked dirt) before I start the standard 2 bucket mitt wash? Something like the presoak at the local car washes. Waterless wash? APC? Diluted car shampoo in a spray bottle? Nothing at all?