The stencils are a combination of hand-painted stuff and self made decals/waterslide transfers. You can buy 'print-your-own' decal paper on ebay or from hobby shops and it seems to work with most printers. Use the link below to get some great Stencil fonts (also check out the Grafitti).
http://www.dafont.com/theme.php?cat=114&page=4Do a word doc with the words you want then print that onto the decal paper. Apply the paper then cover the whole area with a couple of coats of varnish to hide the edges. Easy. Signs are even easier. Copy photos/graphics of signs from the net, paste the pics onto a word doc then print on normal paper. Cut out with a scalpel, varnish the target then the sign. Although they stand a little proud of the surface it doesn't look too odd, as most signs are plastic/metal and attached, not painted on, in reality.
For those who have asked for a tutorial on weathering, I'll try and do one with a Sand Tigerz vehicle I have on the go at the moment. It'll take me a week or tow to finish and post it.
As for the 'props' mostly they are made from 1/48 scale vehicle stowage packs. I have a bits box which is over-flowing so I'll try and show a little more of it. Many of the photos thus far have been a bit hurried. The piles of stuff with covers over are just bodghed together and the covers are made from material soaked in PVA glue and left to dry. Very simple to do.
Many thanks for the encouragement.
Mac