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Ultimate Compound is not as aggressive as M105. It is indeed derived from it and it is much more forgiving when used on a D/A, but it is not as aggressive. UC is also not body shop safe while M105 is.
With regards to the chart posted by Bill, it is a bit outdated. ScratchX has since been replaced by ScratchX 2.0 which is now more aggressive than M83, as are SwirlX and Ultimate Compound. Within those three new(er) products the level of aggressiveness from least to most is SwirlX, ScratchX 2.0 and UC.
D151 is a somewhat unique animal and it's cutting ability can be a bit difficult to classify. It can be used on a rotary with a wool pad, on a D/A with a finishing pad, and everything inbetween. The cut will vary dramatically when using these two ends of the options spectrum and can be fine tuned anywhere in between. To some degree the same is true of our other products - for example, M205 can be used with a polishing pad or a finishing pad and the total cut will be reduced when using the finishing pad, but D151 is compatible with probably the widest spectrum of tools and pads. M105 can be used on a rotary with a wool or foam pad, or on a D/A with a couple of different foam pads. The total cut is going to be different, and dramatically so, when using M105/rotary/W5000 or M105/DA/W8207.
From this we can quickly determine that the cut of the product alone is not the whole story since the pad and tool can have a huge impact. But even beyond that is how each liquid actually works. DAT and SMAT abrasives are quite different technologies, and sometimes one will work far better on a given paint system than another. In fact, sometimes a less aggressive SMAT product will get a better result than a more aggressive DAT product simply because of the nature of the paint. Regardless whether you believe that paint to be "hard" or not. And that less aggressive SMAT product might well finish out a lot nicer in the process. Or it might not.
Confused? You should be if you're simply trying to classify a product by it's inherent cutting ability alone, because that's just a tiny part of the whole process.
Michael Stoops
Senior Global Product & Training Specialist | Meguiar's Inc.
Remember, this hobby is supposed to be your therapy, not the reason you need therapy.
Without looking at every label on every product, what would you consider best products for a DA with a foam pad for 1. heiavy cut andscratch removval. 2. medium cut and swirl removal. 3. light cleaner for paant in good condition. I know pads and pressure influence things, just looking for your best reccommendation. Thanks. Jon
The list above is only a starting point. Ultimately which products you choose will be determined by your skill, the condition of the paint, how hard or "polishable" the paint is, and your personal preferences - especially with regard to your final wax selection.
Some other things to keep in mind when working with the
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