Started to wipe down the mortar from the bricks. As mentioned before my technique is to use a stiff brush to clean the mortar off the bricks. This technique was developed in making quite a few building fronts using OGR panels. I could never develop a technique with a damp cloth on these panels without wiping away the mortar from the mortar lines.
For this Korber kit I started out brushing but decided to try a damp rag for clean up. the damp rag worked on these panels.
These are the walls with the initial coat of Robert's Brick Mortar
These are the brushes I use. The bristles start out a lot longer but wear down with use.
This is after using the brush. If you are looking for a weathered look you could probably stop here.
This is after the damp cloth. Don't attempt to clean out the corners with the rag. Instead leave them for a damp micro-brush later on. Some areas of missing mortar can be touched up with another application of Robert's or light weight Spackle (I use my finger for Spackle).
Before using any kind of weathering wash be sure to spray the mortar with Dullcote or equivalent otherwise the wash will move the mortar everywhere!
Joe