That’s up to you and the brush that you are using! Power scrubbers usually come with rounded, software brushes for gentler cleaning tasks, and stiffer, less rounded brushes for harder cleaning tasks. Obviously, if you try using something like a stainless steel brush on your bathtub, you’re going to have problems. To avoid scratches and damage, use a light touch and go slowly, starting with the softer brushes. Remember that materials like vinyl are far more vulnerable than ceramic tile. If you are particularly worried about causing damage, our Black + Decker pick with scrubbing pads is an option designed for avoiding damage.