The first building out of the gate for the Post Apocalypse terrain set is the A-Z Mart (weathered) from the "Survival" line over at Antenocitis' Workshop

This is a super cool model with great details and a lot of playable interior space.
 In addition to the usual great photo print details there is a lot of damaged glass for the windows and the doors to the coolers, which give a really convincing 3D effect to the coolers.

The building is Prepainted MDF which really means that the MDF is covered with a single color surface process that helps make it look less like MDF and when you go to do some additional painting its a great starting point.
 For this building I've gone with the prepainted color scheme and just added some weathering, decals (Antenocitis Workshop and Ginfritter's Gnomish Workshop), and the odd bit of flat art to that.

Weathering was accomplished mostly with Forge World Weathering Powders Medium Earth, Black Soot, Red Rust, and Orange Rust.

I didn't additionally weather the glass because the cracking effects might be obscured.
The Newsboxes on the outside are also from Antenocitis Workshop and I used some of the photo elements from the A-Z Mart to create newspapers and other signs on them.

The Newsboxes are very heavily weathered like the pay phones from the previous post using the same technique but with red instead of blue.

The AC unit on this model has been swapped for one of the MDF units from the Lazy Dog Saloon.  The AC unit provided with the model is resin cast and has a sleeker rounded look and a lower, longer shape.

Next up is the Pristine version of this building and LED retrofits to the Undertown table.