I sprayed Q²M Tar REDEFINED but I don’t see brown colour - Why ? March 07, 2025 20:53 Updated If there is no tar contamination present on your vehicle the solution will not react and turn brown. Related articles How to use it ? How to store the product after use? What is the shelf life once opened? Do I need to agitate the solution ? After rinsing Q²M Tar REDEFINED I still feel my paint contamination - Why ? Where to apply ?