A question about the plastic color of the model..... would that color work if you didn't paint it, and just painted or used the decals and then did some grime, rust, blast marks, etc. and used the plastic color as the body color? I was thinking that a lot of the tiny detail might fill in if not careful with the paint.
You could absolutely get away with it,however, he biggest issue is getting rid of that plastic look.
I found it best to spray it with something like Testors dull coat or a matte sealant first before weathering. I like the Testors dull coat or Game Workshop Matte Varnish because it tones down the shininess of the plastic in addition to giving a better surface for the washes and pastels to stick to.
I have done that exact thing with some of the Revell kits since I just did them as out of the box quick builds...
Revell Y-wing (a painted Fine Molds on the left, a dull coated and weathered Revell on the right)
http://i359.photobucket.com/albums/oo32/blakeh01/Star Wars models/DSC00167.jpg
Revell ARC-170 easy kit
http://i359.photobucket.com/albums/oo32/blakeh01/Star Wars models/IMG_3796.jpg
http://i359.photobucket.com/albums/oo32/blakeh01/Star Wars models/IMG_3794.jpg
And this Revell Snowspeeder
http://i359.photobucket.com/albums/oo32/blakeh01/Star Wars models/DSC00167.jpg
In this case though, based on past horror stories regarding the Bandai plastic cracking, I would stay far away from oils washes using turpentine or mineral spirits or enamel washes without a proper paint layer first.
If your just going to use acrylic washes and weathering powders, than you won't have anything to worry about.
If your looking for a quick, easy color that seems good to me, you might pick up some Tamiya AS-20 Insignia White. I used it straight from the spray can without any primer on my Fine Molds falcon and it seems like a great color (the color is bit off in the photo though due to lighting conditions and no flash)
