Now that you've made your joints you can start painting! I used a stone textured paint, a cinnamon colored paint, the light and dark tan paint I used to paint the joints and also black spray paint. Again, be creative and use different colors to achieve different colored bricks and textures.
Bricks have a lot of variety in their appearance and some of the things we want to create are: Highlights, Lowlights, Speckling, Scratches, Shadows and/or Wear.
I used a couple different techniques to achieve these qualities. I started by spraying my two base colors together, then applying a piece of glossy paper and lifting. (Note: If your paint is not wet enough, the paper will stick and leave little chunks if you are not careful. It does require practice and patience.) This is the same technique artists use for Space Paintings (search youtube
for examples). I also did a "scrumbling" technique with a plastic bag on my hand and just dabbed and rubbed the wet paint. After I got a good mix I lightly touched up areas I wanted to with one of the light base colors. You want to try to individualize bricks since they are separate pieces in a wall and not one big component.
Once you have all the bricks painted, take your lightest colored spray paint and barely press down on the nozzle just until it starts to sputter. This will create a speckling effect on the bricks. You can do the same with black if that's the texture you want. Finally, I lightly touch the bricks on the "bottom" side to create a sort of shadow.
Again, play around with these different techniques and try to come up with others that get the effect you're looking for - just let your creative juices flow or spray.