I recently begun a weathering project on my Y-Wing. The factory-fresh gloss of it was just disconcerting, especially since the Star Wars universe was always so dirty. The process is far from complete, but basically, I gave the vehicle a wash with charcoal pastel and sealed it with dullcote. There will still be more details to include such as oil stains, lazer burns, exhaust stains, etc. but even with a dirty wash over it, the Y-Wing looks better in my opinion. I'll post pictures eventually.