I am wanting to give my blue foam a light coat of brown or some earth tone paint before I start on any scenery or track laying ,,, I am wondering if I need a special paint,, I dont want it to start flaking off after a while or when I glue the scenery and other things down I dont want the paint coming off,,,,, ,,,,, or is it even necessary,,,,, ,, I thought it might be a little more forgiving if there is a spot here and there that i miss with grass and stuff if it would be brown instead of blue,,,, has anyone ever done this,,, , thanks,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,st