Not all buffers are the same. Mine is a silky smooth buffer and you would never think it could do anything, it is so soft. I never use the other sides of the buffer block. My nails are very strong.
"Buffing nails encourages blood flow to the nail bed and creates a smooth, shiny, and healthy looking nail surface. Use a fine buffer rather than a coarse buffer on nails. Buffing can be done on bare nails or over polish, but use care over bare nails. Buff gently and down in one direction. "
Source
<a target=_blank class=ftalternatingbarlinklarge href="http://skincare.lovetoknow.com/Nail_Care">http://skincare.lovetoknow.com/Nail_Care</a>
"Buffing nails encourages blood flow to the nail bed and creates a smooth, shiny, and healthy looking nail surface. Use a fine buffer rather than a coarse buffer on nails. Buffing can be done on bare nails or over polish, but use care over bare nails. Buff gently and down in one direction. "
Source
<a target=_blank class=ftalternatingbarlinklarge href="http://skincare.lovetoknow.com/Nail_Care">http://skincare.lovetoknow.com/Nail_Care</a>