The foam is intended to loosen the debris which it will, but if you don't rinse it off then you might as well not even foam it! The big differences between the two are such that the Cannon's Foam will stick a LOT better than the Gun's Foam. Foam it up and sit tight. The plus side about any foam cannon on a garden hose is that if you have a trigger you can apply soap to one panel, hand wash then rinse. Foam Cannon vs Foam Gun: How are they Different? Chemical Guys ACC_326 Foam Blaster 6 Foam Wash Gun. then rinse again. of Water with 4oz. I have seen some different techniques when it comes to washing the Z. It is important to note that while they essentially do the same thing, which is to create foam that can be used for cleaning your car, foam guns and foam cannons are different from each other. Foam Cannon's on the other hand, require a pressure washer. Foam cannons, on the other hand, are designed to be used with pressure washers. The DK Foam Cannon allows you to wash the vehicle without even having to touch the vehicle, reducing the chances of creating holograms and scratches which are caused by rubbing dirt into the painted surfaces. SCOTT WITH DALLAS PAINT CORRECTION & LUXURY MICROFIBER TALKS ABOUT WHY FOAM CANNON'S CAN ACTUALLY HELP WITH CAR WASHING https://luxurymicrofiberstore.com/ Foam Cannons (snow foam cannons) produce a generous amount of thick soap that sticks to your car/truck allowing for a touchless car wash or a precursor to a hand wash. of Car Shampoo. A spray gun to apply a foam skin or hand washing with a microfiber mitt. Another thing you'll notice with a pressure washer is you'll use much less water. High-pressure water ensures the use of less water and soap yet a proper foam thickness. The Foam Cannon sprays a very thick foam and completely covers the vehicle for the safest car washing experience. Or two buckets with a high quality hand washer :) What do you guys prefer and use. Our Foam Gun's hook up to a standard hose and shoot thick foam on your car to help pre-soak the vehicle. This particular foam gun contains several great features that makes this a great investment to go along with your car wash arsenal. Basically, the main difference between the two lies on where they are attached. pressure wash to get off grime (i use the electric Ryobi power washer with the 40 degrees tip, it's gentle enough to not hurt the paint but good enough to get off dirt) then I foam cannon, let that sit to take off any other debris, wash that off, then 2 bucket method to get all the rest of the dirt off.