You can apply SCHOLL Concepts S40 by hand or machine, although for best results we recommend the latter. By hand, apply SCHOLL Concepts S40 to freshly decontaminated paint using a SCHOLL Concepts Polishing Puck. Only 3-4 pea-sized drops of product are required per 12 x 12 area, and these should be worked in firmly and evenly until only an oily residue remains. This residue should then be buffed off carefully using a PB Super Buffing Towel. For best results using a dual action polisher, apply SCHOLL Concepts S40 to freshly decontaminated paint using either a SCHOLL Concepts Spider Finishing Pad or a SCHOLL Concepts Premium Finishing Pad. Only 3-4 pea-sized drops of product are required per 18 x 18 area, and these should be worked in thoroughly at 4000-5000 orbits per minute (speed 4-5 on most dual action polishers), applying moderate pressure for the first 90 seconds or so, and then progressively lighter pressure for a further 90 seconds or so, until only an oily residue remains. This residue should then be buffed off carefully using a PB Super Buffing Towel.