I had a sort of similar experience to that of xfactor841 with a red Lag2
Mine was what looked like a number 6 etched in, on the paintwork of the bonnet. The car was approx 18 months old @ the time, the Renault paint expert also said mine was caused by a pigeon dropping, I don't let any kind of bird crap stay on my cars.
After a lot of heated verbal on my part which went on for a couple of months, I insisted on a meeting with the overall General manager of my local dealership.
Before this meeting had been agreed, let alone taken place, I was notified by the Service manager that an agreement had taken reached & the complete bonnet was resprayed.
In my case total bl00dy mindedness, & perseverance won the day.
xfactor841 What you do is up to you, I was like fairly polite large Alsatian with a brand new big bone.