I purchased this after reading rave reviews in several different forums and websites. The reviewers were right. This product does exactly what it is intended to do. It's perfect for compounding a vehicle in need of paint correction. If you have swirls and light scratches, then this is what you use if you want to eliminate them. For those that use off the shelf waxes at the auto store (as I used to do), they only temporarily cover up the swirls, they do not remove them. I spent close to 30 hours researching how to properly do paint correction and this was one of the most hyped compounding polishes out there from the pros.I started by using a clay bar and clay lubricant on my car to remove the contaminants in the clear coat that even the M105 won't pull out. Then after washing the car, I used a Porter Cable DA polisher (also purchased here on Amazon) to compound the car's surface with the appropriate pad (typically orange). I worked in 2 foot by 2 foot sections and used cross hatch patterns to assure even coverage. This really brought out a lot of shine and this isn't even the polishing stage yet! It wouldn't pull out one heavier scratch that I have, but it made quick work of the smaller scratches and completely removed the swirl marks. Keep in mind that this is an abrasive. You don't want to use this every time you detail your car because it removes a very small amount of the clear coat. You should hopefully only have to use this once to correct the issues then you can maintain the paint from there.I then used Meguiar's M205 to polish the car, again using the DA but this time with a white pad designed for polishing This is what brings out the shine! It's like wood working.. you start with a rougher 120 grit to get the majority of the roughness out, then move up to a less aggressive 240 grit sandpaper to smooth it out even more. These products are simply liquid sandpaper - one has more grit and the other has less. One does the dirty work, the other finishes it offFor what it's worth, I then followed up the polishing with 2 coats of sealant and 2 coats of Carnuba wax. The before and after is simply amazing and that's saying a lot because the car I did all of this on is yellow, not a color known for high gloss and reflection quality like you see on darker carsHighly recommended!