This is the iron I asked about a few weeks ago, The black iron and handles are in good condition but the blue enamel has white stains that look and feel like hard water stains. Would bleach remove the blue from the enamel? Rub vinegar on it? I dont want to scrub it with anything abrasive but at the same time I would like to brighten the blue as much as possible. Any help will be much appreciated, Thanks, Tony