There was a query about surface detail on laser cut buildings on the Crooked Dice forum.
The only one I have is a (unfinished) 40mm building, laser cut MDF with a laser cut plastic detail skin:
The building was given an overall spray of Halfords grey primer followed (after masking the windows and door) with a spray of Halfords red primer.
The kit comes with laser cut plastic doors and windows.
And yes, the diagonal scratch on the paint is where I dropped it.
The figure (out of focus) is a 40mm ProjektX power armoured Weird War Two soldier. Here it is in focus: