I have been kicking around composite for a new deck we may put in. I saw a light brown deck the other day with a grease stain near the bbq and I agree......not so pretty. The owner was pretty frustrated because they too had not been able to get it out.

The other thing that seemed odd was that, where their Shephard would lay down there seemed to be this general smudge. I wonder if the oils from his fur were getting on the deck. You sure could see it on the wall at that same spot.

I might have to rethink the composite thing if there is no good way to clean it.
Mark