SPI1081602 Heavy Duty Water Spot Remover, Safe for Cars, Trucks, Motorcycles, RVs, Home, Office & More, (2 Pack) 16 fl oz

This product from Chemical Guys works exactly as advertised and delivers impressive results. I used it to remove stubborn water spots on my car’s paint and glass, and it worked quickly and efficiently. The gel formula is easy to apply, stays in place while you work, and doesn’t run like other liquid removers. What really stands out is how effective it is—even older, baked-on water spots came off with minimal effort. After using it, the surface looked cleaner, smoother, and ready for polishing or waxing. It’s also safe when used as directed, and it doesn’t leave any residue or damage the finish. If you’re dealing with hard water stains on paint, windows, or chrome, this is definitely a product worth having. It saves time, works fast, and gives professional-level results at home. Highly recommended.

Finally a hard water stain remover that actually works. I’m not a fan on chemical guy at all but this product took years of hard water off of my bathroom shower doors. Great buy. MAYBE I’ll try their other products again

I tend to get bad spots on the right side of my truck due to the hard water that comes from my sprinklers, so I've used this a couple times the last year now. I know, I know, why not adjust the sprinkler or move the truck, that's a different story. Anyway, this stuff works great. Not only can I use it on the body, but it works great on the windows. Definitely recommend this if you have bad spots. Just follow the directions. be sure to work in small spots, I tend to do roughly 12x12 square sections, takes a while but the out come is great. Wipe it on, wipe it off, then wash section with clean water. I then wash the truck off with Dawn to make sure I neutralize the chemical one final time, then use wash/wax of choice afterwards. I drive a 21 Silverado, and it takes about 3/4 a bottle to do the whole truck, including the windows.

I had a professional detailer that could not get the hard water stains from our sprinklers off of my Mercedes. He did the full wash, wax, clay bar, everything and could not remove the spots. After reading the reviews on this product I decided to take the chance and purchase two bottles. I received the bottles within a couple days along with their finishing wax and applicators and tested on a small spot and did not see any issues on the pain so I decided to do the whole side that had the water spots. Following the instructions exactly I was amazed to find that it eliminated the water spots almost immediately, some areas took additional work but after another pass it cleared out all of the hard water spots. I only used maybe an eighth of one bottle and it took care of the whole side of my car so I let my detail or know about the product so he could use it for reference in the future. I didn't tape off a before and after section but I did take some pictures below that will show you the treated spot and the untreated spot and the final product so you can see the difference. It was as easy as waxing and buffing. Great product highly recommended.

Oh my gosh! This stuff REALLY WORKS. I had no hope for my commuter car, which is parked outside, in the constant path of my sprinklers, in a city with some of the hardest water in the state. I bought this months ago but finally broke it out to use it. I had no hope, but my passenger window was so badly scaled I had to drive with my window down to make right hand turns because I couldn’t see out of it! I used the gel and didn’t even have to scrub, which was also unexpected, and it really cleared the window. I am in utter shock! 2 years of summer sprinklers hitting that side of the car. I wish the photos were accurate enough to show you but I swear, I am forever changed by this. Lol