I washed my car about 3 weeks ago since then I been on holiday in Egypt, came back noticed the car has been attacked by bird poo so decided I better wash it (yesterday) and for some reason the poo has burnt into the paint. I had a pot with t-cut but no luck. im not sure if it's the hot weather we have had over the past few weeks but I've left bird poo on my car longer than 3 weeks and never had any problems.
Sam.
Sam.