I liked this image in the challenge, but thought the barn itself was a bit overprocessed, mostly because of the look on the roof. The roof IMO, is a bit flat and has a lack of texture that the shingles on it should give like on some parts of it.
I did how ever understand that it was kind of what you were going for in the weathered look, and I liked alot of the other post processing techniques overall and I gave you a 6.
OH, very nice shot, great cloud formations. Only a couple of things stand out to me however, the roof has almost a painted look to it and you need to bring out just a tad more in your darks.