"Fowl" play

My radiator overflow coolant tank on my 360 was due for a repaint. I take it off after work on Wednesday evening, prep it, then shoot it with some Trim Black on Thursday morning before work. I have found that simply setting up a stand in my back yard in the morning before any wind comes around is just as effective as turning my garage into a paint booth for small parts such as this. I was going to call a friend from work and have them move the part into the garage after a couple of hours, but thought to myself, "I live alone, no pets, what could possibly happen?". So, I just let it sit there all day.
Well I get home, go into the backyard to check out the part, and instantly realize why moving it into the garage would not have been a bad thing. Namely, two Mount Fuji sized mountains of bird **** right on the top. I try not to panic. I bring the part into the kitchen and under the sink. The white pile came off fairly easy, but I don't know what that other bird was eating that day, because I about never got that black pile off. Anyone have a .410 shotgun I can borrow?