Inspired by this thread http://www.the-gauge.com/forums/showthread.php?s=&threadid=7542&highlight=freight house I decided to try my hands on an HO building (instead of as usual N). So before Christmas I bought the kit and spend whatever spare time I had during the holidays painting it. Yesterday I finally got around to do the roof and here is my question. How do you get that weathered look to the tar paper? For the tar paper, I cut black construction paper into 4' x 30' strips and used a glue stick to glue it to the styrene. Then I weathered it with pastel chalk, and when I had the right look, I sprayed it with dull coat. Big was my surprise when I saw that it was as black as before I applied the chalk. Hmmm, maybe I had been spraying too close, so I added more chalk, sprayed from further away, and... yep, almost as black as before. So what am I doing wrong ? Also, are the door handles on the freight some commercial handles? Any help is appreciated.