For the Gradient Silver Nails I used 3 nail polishes. Milani in Ms. Milani, L'Oreal in Silver Star (appears to be discontinued), and Wet n Wild in Kaleidoscope 460D. First, I added a base coat. Then I used a make-up sponge to sponge on color. I painted Ms. Milani directly onto the sponge. Then I sponged the color onto the nail, about 1/3 of the way down the nail. I sponged a second coat of this polish starting further up the nail. Next I used Silver Star and sponged near the tips of the nails. Then I used Kaleidoscope and painted on a coat starting halfway down the nail. Finally, I added a second coat to the last 1/4 of the nail. Sponging on color leaves thin coats and dries quickly. There is no need to wait between coats of polish.
To reuse the make-up sponge for another manicure, just snip off the dried polish from the sponge with a scissors.