Yellowed limestone from salt and baking soda

Yellowed limestone from salt and baking soda Images

Yellowed limestone from salt and baking soda

Yellowed limestone from salt and baking soda Description

    Help! I tried to clean some unsealed limetone (on a fireplace hearth) with salt and (http://maplered.com) baking soda. Now I have ugly yellow stains on the stne from the salt and (http://maplered.com) soda. Is there anything I can do to get those stains out?