Remove excess nail polish from the spill area by lightly scraping it up with the side of a butter knife.
Soften and remove as much of the remaining fingernail polish as possible by gently sponging it with a clean white cloth dampened in mineral spirits. Change to a clean spot on the cloth as it becomes soiled and continue to blot the stain until the cloth no longer shows color.
Treat the fingernail polish stain with dry cleaning fluid, available at retail stores. Follow the directions on the label.
Rub a small amount of furniture oil into the treated area to replace oil removed by the dry cleaning fluid.
Scrape off the excess fingernail polish gently with a butter knife.
Place a pad of clean white cloth or paper towels on a flat work surface.
Lay the clothing with the fingernail polish stain placed face down over the pad.
Sponge the stain from the backside with a clean white cloth moistened with fingernail polish remover. Work from the perimeter of the stain back toward the center to avoid spreading the stain.
Lift the clothing and move the absorbent material underneath to a clean spot. Replace the clothing on the clean pad and continue sponging it with fingernail polish remover and a clean white cloth. Change the sponging cloth to a clean spot as it picks up color.
Continue the sponging process until the stain is no longer visible.
Pre-treat the clothing with heavy-duty liquid detergent and launder the clothing normally.