Blue77,
Here's an idea I've been kicking around that you might want to try.
I thought about getting a scale arf like the hanger nine cub or maby the great planes waco and ripping the covering off and put fabric on it.
Then you could put panel lines and rivets, maby some rib stitching too.
Sometimes you can get a hole in monocote just loading and unloading the plane from your vehicle