When Autogeek has a sale or BOGO special, I will try about any brand to evaluate performance and value for the money. I have had good results with other high-quality SONAX products, and Fallout Cleaner is no exception. Fallout Cleaner is definitely effective at removing ferrous contamination and also seems to have a general cleaning effect wherever applied. In that regard, it is great for cleaning lower valences/rocker panels. Is it the best product in this category? Subjectively, everyone probably has a different opinion, but I keep coming back to SONAX Fallout Cleaner after trying other brands.