Do I need to agitate the solution ? February 15, 2019 11:11 Updated This solution can require swiping motion with aid of a microfibre Related articles I sprayed Q²M Tar REDEFINED but I don’t see brown colour - Why ? After rinsing Q²M Tar REDEFINED I still feel my paint contamination - Why ? How to use it ? Where to apply ? How to store the product after use? What is the shelf life once opened?