Once the cowl flaps were figured out and installed I worked on running wires to them. The wires run along the inside of the engine cowling (think high heat, vibration, grease, fuel, etc) so the first thing I wanted to do was seal the fiberglass. I used straight epoxy and just spread it around the entire inside of the cowling with a squeegee. After the epoxy was dry I painted the cowling with some high temp engine paint. Now that the fiberglass was sealed I placed a heat shield material on the cowling in the areas of the exhaust.
The wires were then taped down using smaller pieces of the heat shield. I also spread some fire barrier caulk around the wires to help protect them against heat and wear.
Here you can see how the wires travel along the cowling under the tape.
Here is the finished product. The heat shielding is sealed around the edges. Also, you can see the connector for the cowl flaps in the top RH of the cowling. The connectors is placed there so its easy to disconnect the power and remove the lower cowling. With the compound curves the heat shielding was kind of a pain to install. I had to make a couple layers overlap, but I'm happy with the final product.