[TankDan]

While the color of the rubber on the roadwheel doesnt feel quite right to me, the texture of it looks great...how was that achieved?
For rubber I nearly always mix some India Ink into my color. Being water-based it will mix with most acrylic paints and seems to add a certain sheen to the paint. For new rubber I mix black and red, for older rubber I go for a dark gray. Bear in mind that rubber is dyed...natural rubber is white.

I do also agree with David that your paint weathering has a unique look that may not be considered "common" among service AFVs. As a modeler I find it a little peculiar. As an artist I think it looks tremendous...some of the most interesting weathering I've seen. Accuracy VS Art. It's tough sometimes!