It's pretty well done.
Here's my critique:
The weathering is pretty arbitrary. It's good to have some idea of what caused the weathering, rather than this which appears to be to scuff up anything raised and sort of mud up all the details a little. For instance just surrounding the ports with brown grime. Why do that? Maybe run some rain water stains down the hull.
The 77 decal silvered badly. The model would look a lot better without it, or go in and fix it.
Big model, eh?
MM your photography is much improved, really helps.