I agree with Bunky. Most foam guns (like hook-to-your-hose types) are simply delivery systems for your wash solution, APC's, etc. typically for the purpose of allowing the product to dwell. I have a Gilmour Foamaster I use for some situations but not for my regular routine. Some folks use them all the time but whether you do or if you even end up finding a niche for one in your regimen will depend.