Mikey don't you own a turbo tile tool or other spinner? I almost never use a floor machine or abrasive pads to pre-agitate. I've done some scarry buildup and coatings in 28 years and find that the right chemistry, heat and pressure makes me move fast and efficient. Coated tile, slate, sandstone, limestone, porcelain, quartzite, pavers, vitreous clay, quarry and many other surfaces just power clean if the cleaning pie is complete.