Here's a little update on my Mos Eisley Cantina inspired building: After gluing all the foam parts together, I began coating the model with polyfilla, which I would then sand down once it was dry.
In this image you can see why its necessary to sand down the polyfilla once its dried - the walls nearest to the camera need a fair bit of smoothening.
I then flipped the model upside down and glued some corrugated card (bought from a stationary shop) into the doorways and bordered these off with some corrugated cardboard (these were made from those cardboard rings you put around you cup in Starbucks - I just grabbed a bunch of these when I was there last).
I've still got a bit of work to do where sanding is concerned - in a couple of places at least, then I might apply a little PVA and sand sparingly in a couple of places to give a mix of textures on the final finish, which suggests damage, erosion, weathering etc.
Edited by galantiniCorrected image paths