Removing white-out marks

Removing white-out marks Images

Removing white-out marks

Removing white-out marks Description

How do you remove white out marks from German Green LimeStone (http://g603.net) and (http://maplered.com) Honed Black Granite?.. have tried acetone, paint thinner, and (http://maplered.com) rubbing alcohol...no luck yet..any ideas?..maybe denatured alcohol?..