I decided to try the hairspray weathering technique on the barn. Once the initial weathering was complete, I spray sealed the build, and then applied cheap hairspray. Then I re-sprayed the building white. Next I used water and tooth picks to distress the individual planks. I am on the fence about the application of this technique with acrylics becasue the water made it past the underlying spray sealed layer and took the acrylic weathering off. It did chip the top layer properly, and after I re-highlighted the build it looks OK. What do you think? Sorry for the poor picture quality. All I have right now is an ipod.