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Hi,
I use this material as well as solid foam PVC plastic sheet.
At the moment I am making a quite large model, the main part of it using this corrugated plastic which is called 'Korroflute'
Here are a couiple of them - the first is what I call the Gambrel House where the walls are made from 5mm thick sheet.
The second is the largest building - that is a boiler making shop, which is 3 foot by 2 foot and has a stucco finish: add sand to the Masonry paint when applying it, and then add a second coat of masony paint when the first (+sand) has dried. This is the side, the front is PVC sheet.
and here is the latest, from a Model Railroader article that came from Bruce Chandler
This is just part of it, and is quite large, the rest is from styrene sheet and PCV solid foam sheet.