Added more Green Stuff. Can definitely tell I don't sculpt at all, but this contest has pushed me out of my comfort zone and nudged me to try it, so I'm happy I'm expanding my skill within the hobby.
I used an old brush (pulling out all the bristles) to get a sculpting tool to do the rivets:

I think it looks okay (I have no idea why that photo is off centre - I blame the eve of a looong weekend

).
Also found two snotlings to fly with my pig, they're not being helpful to each other:


The angle's a little off - but the back guy is really clinging on for dear life. The PVA glue in the smoke trail is taking a little long to dry.
Think I'll be painting by Friday (and maybe I'll get the tower done, we'll see).