Re: Wet leaf stains
similar to William's suggestion: dish soap and chlorox. This is what a used boat and junk boat yard guy said they use for pine pollen stains and everything else. The soap cuts the stuff and floats it to the top, and also holds the chlorox on the surface, so don't underestimate it (or use it to thicken other products--note that toilet bowl cleaner is thick). And let it sit after you scrub it up to a lather.