11audi Posted August 29, 2013 Share Posted August 29, 2013 I put opti coat on three weeks ago and had some bird droppings on the hood yesterday.wash them off today and they left a stain!! Like I didn't coating on the car!! What's up with that?. How do I get the stains out? Link to comment Share on other sites More sharing options...
Ron@Optimum Posted September 3, 2013 Share Posted September 3, 2013 The stain is a chemical residue, not etching, so it will disappear on it's own. Give it several days and it will be gone. Ron Link to comment Share on other sites More sharing options...
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