I'm very new to model railroading -- N scale. Not sure this is the right forum for this question, but this one seemed most appropriate. I'm in the middle of building my very first structure. An old brick factory. I have the walls painted Boxcar Red and they've been fully weathered. The windows and doors have been painted a prototypical green color and installed. Basically, what I have is the building fully assembled without roofs or misc small details in place. The problem is that the colors are not what I thought they would be. From a distance, the brick and windows/doors don't really have any contrast, and the entire building has a brownish look to it after weathering (I weathered the brick...not the window frames). What I'd like to do is leave the window/door color as it is but lighten the brick without having to repaint the whole thing and re-weather. I don't currently have mortar lines because I found that I wasn't very good (in N scale) at doing a mortar wash. Maybe that's one route I should try again. But is there an easy way to lighten the brick color across the entire building without effecting the windows? Is there a product I can maybe just brush on that will lighten the overall color?