hey yall, I am trying to surprise my parents by completely detailing their 09 convertible. I tried to search on here and google some good products, but nothing seemed as bad as how their top is. they have to park under trees, so the top is covered in sap and dirt (well thats what im assuming the black spots are). I will include some pictures too. But to get to the point, what would yall use to get this top spotless again?