Menzerna Top Inspection is a safe, water-based cleaner formulated to clean just-polished surfaces so you can inspect your work. When polishing, there are oils in the polish that help with working time. These oils can sometimes hide the true correction that is done from polishing. By wiping the finish down with a product like Top Inspection, you clean away the oils and see the actual clear coat. If you don't see swirls or scratches after wiping with Top Inspection, you can rest assured the surface has been corrected properly and you can move on to the next step. This water-based spray contains no silicone and can be safely used on paint and plastics.