Thanks for the kind comments, folks. She'd love to do more but motherhood, homeschooling and singin' keeps her pretty busy. Doc, we can't claim any credit for the technique, it's been around for years. We used plain tissue paper cut to a scale 3 foot width. Just like real roofers, "tar" the roof first using flat black or Floquil Grimey Black, placing the strips into the still wet paint as you go, curving up either side about a foot. Once dry, paint the whole thing with you "tar" color paint. Weather it with powdered pastels then fix it in place with Krylon Matte Finish, a much more economical alternative to Testor's Dulcote. The final touch is carefully applied gloss black paint. Using a 000 brush, just run a thin strip along the edges of the seams and along the tops of the sides to represent tar that has seeped out. Snuff, snuff, ahhhhhhh...you can just smell the asphalt.