Where to apply ? February 15, 2019 09:30 This solution is designed to be applied over the whole exterior of your vehicle during the wash process. Related articles How to store the product after use? What is the shelf life once opened? How to use it ? If I don’t have a foam-gun , how can apply Q²M Foam in other-way ? Will Q²M Foam will damage/alter my paint work or coating ? After rinsing Q²M Foam my car is still dirty - Why ?