continue to rub the sandpaper or brush over the nail until you scrape away the shiny finish. don't worry about getting scratches on the nail, since the rust will cover it anyway.
use a 36-100 grit sandpaper.
place your nail in a plastic or glass container. if you’re rusting more than one nail, choose a container large enough to hold all of the nails that you want to rust. don't use a metal container to rust your nails or you may end up rusting the container.
pour equal parts of vinegar and hydrogen peroxide into the container. slowly pour equal parts of vinegar and hydrogen peroxide to form the solution. mixing these two 