Meguiar's Professional So1o All-In-One M300 combines compounding, polishing, and protection in a single professional-grade formula. Its Super Micro Abrasive Technology (SMAT) removes swirls, scratches, and other paint defects, including sanding marks up to 3000 grit when used with a machine polisher, while a low-dusting formula keeps application and cleanup easy. An SiO2-based protectant is worked in during the same step, leaving durable, water-beading protection on the finish. So1o All-In-One can be applied with dual-action polishers, rotary buffers, or by hand, giving detailers control over cut intensity through pad and disc selection.