Rough the nail surface with the pink part of the file. Polish for 10-15 seconds with the white part. Then polish with the white back to give the final finish. Make sure that the file only presses lightly against the nail. We recommend going through all three steps with the file at 4-5 week intervals, but you ban use the white back as often as you like.
3-Step sheen buffer, Three steps to shiny nails.