Flew today during a long lunch. Weird...When I was taking my plane apart I noticed a kinda oily residue over the top and bottom of the left wing. Had to use Windex to clean it off. Never noticed it before. Anybody else ever notice this?

Had a great day at the field. Some outstanding flats spins and great waterfalls. Even got an extended hover or two. Tried harriers and KE and some low inverted passes. Had a great time.

Thanks
Barry