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.

I used Meguiar’s Water Spot Remover on my car’s paint and glass, and it worked really well. Some of the hard water spots I thought were permanent came right off after a little buffing. The formula feels safe on clear coat, and it actually leaves the paint looking shinier afterward. It takes a bit of elbow grease for heavier spots, but the results are worth it.

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.

Once upon a time I tried a number of different products and home remedies that you read about, in the pursuit of removing water spots from car windows. Nothing made a dent, let alone removed spots completely. I cannot speak to this products performance on paint, as I have not yet had the opportunity to use it on paint. I just finished removing the water spots from my Wrangler's windows (hard top) however, the optimal word in that sentence being removing, because they are gone- not faded or mostly gone, but gone. Now, I have had the Jeep for about twelve years, and for all but the first week that I had it, it had water spots on the windows. I gave up on removing them a short time after they first appeared. Fast forward a dozen years and many harsh off-road miles later and I went about cleaning restoring the paint with a rubbing compound, repainted some trim, and once everything was nice looking again the water spots really stood out. There is not one spot remaining after going over the windows with this product- not even around the edges where you would expect to have difficulty. Now I will say that to do this, I used a drill fitted with a three inch buffing pad, and spent about half an hour on each window, going over small sections a couple times. Now, my windows were more water spots than not when I began. You might not have to spend that much time on yours. I did try to do a section by hand to see how difficult it would be without a machine, and I highly recommend a drill pad and attachment. I bought one on Amazon with ten pads for like $15. Oh, and make sure to let your drill cool a minute for every few minutes you go at it- drills were not meant to run continuously.