Thank you all!
You should do more scenery more of the time! Really nice! Can't really read the writing at that angle, any chance of a second shot head on?
Thanks, I'll try and take a closeup and post it tonight.
One could debate if after a zombie outbreak there would be time to print these huge posters let alone find some poor guy to go out and glue them to billboards.
Nevertheless I love it !

You've got a point there. Maybe it's right after the scientists discover the different stages of the Zombie Plague, but right before everything really turn bad/ hopeless. Having said that, the poster was originally created for Warhammer 40K (found it while searching for 40K propaganda posters), so realism isn't a big thing...just send some dumb disposable bastard to glue all the posters to billboards.
This billboard is from Pardulon Models: http://pardulon-models.com/product_info.php/info/p159_Billboard.html
We've got a winner! Yes it's from Pardulon...they've got some great postapocalyptic scenery for sale, I'm a bit of a fan. Every time I go to Crisis I buy some stuff.
Well done, superb weathering!
Thank you very much! The weathering on the poster is done by crumpling the paper before sticking it to the Billboard and then using some washes to add the discoloration. The rust is done with MIG pigments and Modelmates Rust Effect underneath.
Edit: I've just taken a picture (hopefully it's readable now):