My fiance got some bird droppings on the spoiler of her new Fiji Blue Honda Civic SI. They happened overnight and sat in the sun for about half the day before we relized it. After washing the car you could see where the droppings stained the paint. I started off slow and eventually moved up to my PC with Sonus Refinishing Polish and a 4 in. pad. Even after all of that at certain angles and times of day you can still see the stain. Any advice on how to eliminate this.