Meguiar's Water Spot Remover, Heavy Duty Water Spot Remover for Cars, Remove Water Stains and Polish Glossy Paint with a Versatile Clear Coat Safe Formula, 16 oz

I have upgraded my review of this product after trying two other options:1. BioClean2. Meguire's Ultimate CompoundI knew BioClean would be too harsh and it is. For removing water spots, it actually works very well in conjunction with Meguire's Ultimate Compound except for one major problem: it is very abrasive and damaging to plastic or paint, even the acrylic urethane finish on cars. The instructions say not to use on shiny car paint and that is an understatement. It will create fine swirl marks on paint and will haze plastic components like bumpers and sideskirts. BioClean is mean't to be used on glass or household applications like shower rooms. Obviously, what would you prefer: no water spots, or swirl marks on your pristine car finish??? The swirl marks are not as bad as waxing a dirty car, but you can still see it if you look closely.I knew the Ultimate Compound from Meguire's would be a stop down from their Water Spot Remover product since it is basically a compound and it is. It has finer grit in it and is not as effective at removing water spots. Works very well though, if you apply it after BioClean.I found the Meguire's Compound Water Spot Remover will not completely remove stubborn water spots, but at least it won't damage automotive finishes. It also buffs out to a nice waxy shine, much better than the Ultimate Compound. What I do now is apply this product a couple of times. Each time it removes more and more of the water spots. I call it a day after that, knowing any other options may damage the finish on the car, or be less effective. Because this product is a compound, it does remove some paint since my car is Race Red and it leaves the white terry cloth I am using pink in areas if I rub too hard. I then finish up with my wax of choice: 3M Performance Finish.I mainly needed to remove bad waterspotting under the hood and trunk lid, on top the fenders inside the engine compartment and the drainage trough underneath the trunk lid. I had the car in storage and the storage company washed the car a couple of times, but did not wipe off water spots in those areas. This product will remove spots fairly well on areas that were waxed, but on unwaxed areas, the spots still won't come off completely even with multiple applications and hard rubbing. Fortunately, I don't have to use this product on the outside top coat since the storage company dried that out OK after a wash so there are no water spots.BTW, if you want to remove water spots on flat glass, it's easy. Just use a sharp razor blade, works like a charm! Turns all those deposits to white dust. Just blow it off the glass or clean it up with window cleaner. **Wink** Won't work on paint though, as the razor blade might dig in and scrape the paint.

This water spot remover works well. I have had issues with some recycle water spots that I could not remove for years. I used this product and just like that they were gone. I wish I had tried this product a lot sooner. Anyway, I only had to use my hands, and the instructions were very clear on how to use the product. I used just the round white applicator sponge and a fiber tower to wipe off. I worked only in t about a one-foot area. Nothing special was needed and just like that the spots were gone, and the paint was clear and no damage to the clear coat. I purchased a polishing machine but did not need it. I thought I should try first with my hands and see what would happen. I was really surprised when the spots that were there for years were gone. I hope this helps.

Product works if you are willing to do applications over and over. My Miata had a combination of new and old spots (cranked up irrigation system due to new sod, thus the reason for lots of new water spots which do not wash off and you do not buff off) They must be chemically dissolved which is what this product does. Removing spots required as many as a dozen vigorous applications in each area. Only one side of car was affected, and I spent four or five hours with the product. In the end, the results were very satisfactory. The first application or two seemed to remove the spots, but with a good light, it was clear they were far from gone. Also note that the product is thin so goes a long way. I used a little over half a container for this. Instructions and prior reviews are clear - work small area, rub rather hard with lotion in circular motion and wipe it off before it starts to dry. Repeat as many times as necessary. Before and after photos attached.

I drove a brand new black SUV on a week long back mountain road trip. Every day I rinsed the accumulated road dust off with with spring water from the cabin where we stayed. What I didd’t realize was the thousands of mineralized water rings I was layering on the paint. When I returned from my trip none of my usual car care products did anything to get rid of the rings. Frustrated, I bought the 2 highest rated water spot removal products on Amazon. One of those being Meguiar’s Water Spot Remover. I tested both by using one on half of the hood and the other on the second half. The Meguiar’s was clearly outperforming the other product but, was not perfect on the first try. I ditched “Brand X” and, continued with the Meguiar’s. What I learned by the time I finish the WHOLE vehicle was I was not using the Meguiar’s correctly in the beginning.It’s not meant to be used in the same way as Meguiar’s Clear Coat Safe Polishing Compound. Even though the bottles look the same. With my car out of the sun. I took a microfiber towel and folded it into an appropriately 5” square. Using that square as the applicator and, only working on one section at a time. I applied an EVEN AND COMPLETE COAT of water spot remover to that panel. Not too much, not too little. It is the reaction of the liquid sitting on the surface that is removing the rings more than the buffing action. I let the Meguiar’s stay put for a little over a minute before removing it with a clean microfiber cloth in the same way you would buff wax off a car. No need for an orbital buffer. There were a couple of places that I needed to apply a second coat but not many. Keep in mind that my vehicle was completely covered with hard water spots. I used this product on color painted panels and windows only. I was scared to use it on anodized metal and more delicate plastic trim pieces. I am ecstatic about product. My SUV looks like brand new again.Note to Meguiar’s: Do you think after decades of using the same crappy bottle for your products that you might consider a redesign? Setting these bottles down while using them is kind of like trying to balance an egg on its end. The rounded and not always flat bottom end is not conducive to the bottle staying upright. On the other end of the bottle is the worst applicator cap in the world that is always guaranteed to clog-up once the bottle goes back to shelf. No stars deducted though because your products are always awesome.