Oh, I know Jon, but I feel sick every time I realise there is a bit I could easily improve. From those pictures alone I've spotted 4 easily improved bits and 2 more challenging tasks.
1.The belly scales could do with an Asurmen Blue wash followed by 1:4 Regal Blue/Ice Blue highlights.
2. Their are a few bits of bare metal showing through due to wear and tear, each easily fixable with a fine detail brush and Necron Abyss.
3. The tail needs more washes, and 'cleaner' drybrushing.
4. The talons on the Wings need to be re-painted, with three of four coats of Skull White.
5. (more difficult) Completely revamping the base of the model, including talons, rocks, blood etc.
6. (the most daunting) Painting more detailed scales on the blank sections between the wings and the main body.
Well, that pretty much saves anyone else from pointing out the flaws in the paint work so far. I think I've pointed out every aspect I could improve, as I know from experience (see my 40k painting blog), that I can do so much better.
Well, I'm obviously a very harsh critic of my own work. It's a good job I took those pics then.