Using Light Gray Panel Liner For Mortar

I saw some Tamiya Light Gray Panel Liner at my local train store and decided to try using it for mortar on model brick buildings.

Here it is on a couple of walls from a Downtown Deco background flat kit. It takes some time to dry completely, so I'll have to see how things progress. I'll need to continue with the detail painting as well.

I used Robewrs Products mortar on the building on which they're leaning, a Downtown Deco Triangle Fruit Company. This product is still around, and it may still be better.