Old Industrial Photo

I was editing this photo for a pinhole camera effect but I decided to go a bit overboard with the alien skin exposure plugin and this was the result, I will put up a pinhole tutorial soon but this isn't it. I had to process the digital negative twice to bring out the sky as there wasn't much cloud detail to begin with then I just dodged the windows and burnt the clouds for a bit of added contrast. The was about 2 pixels of gaussian blur and a decent amount of vignetting to draw the eye in. This was shot at 17mm on my 350D at f4 for 1/640 (ISO 200) it was at the end of a walk and I didn't fancy getting my tripod out.