I recently did a light detail on my car and tried the Iron-X then ONR sequence because I was delayed and the sun was too hot to do it outside and I regretted it. I applied the Iron-X and let it dwell then attempted to remove it with towels soaked in ONR. The Iron-X and ONR combined into a sudsy mess. I went over the panels with drying towels, but the smell of the Iron-X was still heavy on the car. I ended up doing a second ONR wash to ensure I took off all the Iron-X.