Did up some new track barriers in a fun red and white scheme. The barriers themselves are
Bremer Walls from thingiverse, scaled to 50% size and printed on my Ender 5. Airbrushed, inked and then pastel dust for final weathering.
For the damage, I placed bluetack on the areas I wanted to keep the base primed grey, airbrushed over it, pulled out the bluetack and then washed the holes. It worked really well, even though I wasn't too exact with my bluetack placement.