Floor paint removal tools that work on concrete include an orbital sander, a buffer or a soda blaster. Paint is sometimes difficult to remove from concrete floors because it penetrates the porous material and the tool must remove a few millimeters of concrete to remove the paint.
Using tools to remove paint from concrete is more labor intensive than using a chemical stripper. The orbital sander is generally best for removing paint from small areas. The floor buffer or the soda blaster works best for larger floors. The soda blaster works like a sand blaster, but it uses sodium bicarbonate, which is baking soda, as the abrasive.