The only downside of using laser cut wood instead of hydrocal or resin for brick or stone walls is warpage.  However, as long as you weight the wood down with a couple of heavy books after you’re done with the weathering steps, you will get straight walls.

For Brick:

1. Spray paint the wood with Krylon Ruddy Brown.  Don’t apply too much paint so that it puddles, just enough to coat all the surfaces of the bricks.  Let this completely dry before continuing.
   
2. With a #4 flat brush, scrub in liberal amounts of Doc O Brien’s Highlight White weathering powder so that the mortar lines between most of the bricks are bright white.
   
3. With an old slightly damp rag, rub off most of this powder so that the stones are a light pink and the mortar lines are still bright white.  You will have to dampen the rag several times while rubbing.
   
4. Spray the pieces with unscented hair spray.  This locks in the pigment powder and sets it preventing it from eroding in the following steps.  Let this dry completely before continuing.
5. Dry brush Floquil Southern Freight Car Brown across the brick surfaces from the top to bottom of the piece with the #4 brush.  This darkens up the color of the brick surfaces but leaves the mortar lines bright white.
   
6. After this paint has thoroughly dried, brush black alcohol stain downward from the top of the piece to the bottom with medium pressure so as to tarnish the brick surfaces but leave the mortar lines untouched.
   
7. Brush on an extra coat in a few areas to create darker spots that gradually fade to lighter areas.  Keep it subtle.

For Stone:

1. Spray paint the wood with Krylon Primer Gray.  Let dry completely.
   
2. Scrub in liberal amounts of Doc O Brien’s Highlight White weathering powder so that the mortar lines between most of the stones are a bright white.
   
3. With an old slightly damp rag, rub off most of this powder so that the stones appear a light gray and the mortar lines are still bright white. You will have to dampen the rag several times while rubbing.
   
4. Spray with unscented hair spray to seal the powder.  Let dry completely.
5. Load a #4 flat brush with a small amount of Reefer Gray paint and lightly brush horizontally across the stone piece so that the stones start to become darker gray. Don’t press too hard or load too much paint in the brush so as to get paint into the mortar lines. Do this several times so that most of the stones become darker gray.
   
6. Paint a small number of the stones Floquil Grimy Black.
   
7. Paint yet a smaller number of the stones Floquil Rail Brown.
   
8. After the paint has thoroughly dried, brush black alcohol stain downward from the top of the piece to the bottom with medium pressure so as to tarnish the rock surfaces but leave the mortar lines untouched.
   

Weight down the entire completed piece of wood under a heavy book while everything dries out.  That’s the only downside of using laser cut wood instead of hydrocal or resin for brick or stone walls – warpage.  However, if you weight it down after your finished painting and staining, it should come out just fine.