Looks to me like you've got a pretty good start with your textures. If possible go back and snag a couple more. The more the merrier.
Admittedly it takes a fair amount of Photo Shopping, a degree of artistic license and a supply of stock textures that closely match what you are trying to create. CG Textures is a fair supply for free to use materials. I probably shouldn't admit to it, but an industrial garage door texture was a perfect match for a fluted stainless steel side on some rolling stock. Make do with what you can find.
Following... the Colt Building in Hartford, CT...
ColtStreetVu.jpg
colt front CCCC.jpg
2015-08-18_00001.jpg
You do not have the required permissions to view the files attached to this post.