SuperNail Nail Polish Thinner 1 oz. This SuperNail Nail Polish Thinner is formulated to restore polish to its correct consistency. It thins thickened polish without changing your polishes formula, it also restore thickened nail polish to its correct consistency and make it easier to apply in thin coats. Two to three fine coats will last longer rather than a thick coat of nail polish that will flake or peel within a couple of days