Thickened nail polish? Add a few drops of the Thinner to thickened nail color to obtain the right consistency. It lengthens the life of nail polish. Shades that are dull, colors that do not shine or that peel the day after application? Before doubting the quality of nail polish, it is useful to remember a few simple manicure rules. Did you know that 2 to 3 thin coats of nail polish give a longer-lasting manicure than 1 or 2 thick coats that will simply peel or flake off in a couple of days? The ideal consistency of polish should allow you to apply it to a nail without re-dipping the brush. If your nail enamel is not fluid enough, it should be diluted with a solution specially formulated for this purpose. Never add nail polish remover, as it contains water, which is not compatible with polish.