On this podcast episode Yvan and Dann speak about the chemical decon wash as well. It is around the 20 min mark.
Here are the highlights.
Pre-Wash with ONR
MDR at 3:1. Safe to use around glass and trim. Can be sprayed over the ONR surface. Let dwell for 3-5 mins. Do not let dry.
Agitate if heavily contaminated by using a microfiber towel (plush towel/long nap) that has been soaked in the ONR bucket. Go around the entire vehicle with the towel on the ONR/MDR surface mix. Do not place the towel back into the ONR bucket.
Power Clean at 3:1. Keep it off glass. Let it dwell for a couple minutes. Agitate with a microfiber towel soaked in ONR. Do not put towel back into ONR bucket.
Rinse. Rinse with hose water.
Ferrex. Can agitate with ONR damp microfiber
Rinse. Final Rinse.
All steps do not have to be done. Depends on how contaminated the surface is.
I personally like use Ferrex as the first step on the dry paint even with dirt on the surface. The reason for this is to get the full performance out of it instead of being diluted with water on the surface. I will then rinse it with water to get all the ferrex off the surface. Then depending on the contaminants, I would either use power clean and/or MDR.
Start with ferrex first. That may be all you need to do. There is also the mechanical decon using the wash, clay, wax method.