American railway models.

Backwood miniatures are high detail railway model company in America.

http://www.backwoodsminiatures.com/

There worn out turn 19th century steam trains are the sort of texture and feel that we are trying to create.

There is also "Narrow Gauge and Short line Gazette" :

http://www.ngslgazette.com/

They feature plenty of articles on how to make realistic worn out scenery effects. As do "Garden Rail"

http://www.exacteditions.com/exact/magazine/443/508

Unfortunately its pretty hard to know which issues feature useful information, but I'll look into it.