Review on 🚫 Bio-Kleen M00509 Black Streak Remover - 128 fl oz. by Michael Schafer

Instructions do not specify specific dilutions. I mixed it 1:1 with water and first sprayed onto a clean white terry towel to apply to the exterior of my truck trailer. Nothing happened so I sprayed it straight onto the siding. Mistake. This made bumps in the finish where the paint was etched away. In addition, the paint is very matt where it is not yet damaged. You can see the plate on the right in the photo where I cleaned. I chose this product because I mistakenly thought it was safe. I believe the manufacturers can say something about the possibility of damage to the old paint, but not sure what is considered too old!