With all this talk of weathering, I think it might be a good time to mention that I'm going to be running a weathering group build in 2011. Planning to kick off in February.
Hopefully it'll be a great place to practice and refine various techniques...
jbrady - What did you use to thin the acrylic? Can't speak for Poly Scale, and without seeing your results I can't even guess what happened, but I know a lot of acrylics can have separation issues if you thin them too much. Dishwasher soap is supposed to help, but I get around it by not using acrylics for washes.
I'm actually just coming off my first attempts at using oil washes on aircraft, and it came off really well. I'm using Winton & Newton oils with Mona Lisa Odorless Thinner over White Ensign enamels. Had zero problems with the base coat. Raw umber works very well for dirtying up undersides and lighter colors, and I found transparent white had a very nice fading/streaking effect on the topside.
On the Bench: 1/32 Trumpeter P-47 | 1/32 Hasegawa Bf 109G | 1/144 Eduard MiG-21MF x2
On Deck: 1/350 HMS Dreadnought
Blog/Completed Builds: doogsmodels.com