Unless you know 100% what you are doing when working with any type of acids why take a chance of ruining a vehicle unless you don't mind submitting claims to your insurance company. I have a extensive training program when working with all our different types of chemicals. If you do not have an...
Heat is the way to go to remove gum, I use a turbo nozzle on my wand because time is money. Surface cleaners are design to clean a larger area not for gum removal which beats a wand hands down. We never scrape gum off don't need to.