Hmmm, Keneth, interesting food for thought.
Here's my 2 cents...I've never considered dry brushing to represent dirt and deposits. I figure that's what washes do. The dry brushing is meant to represent worn paint, sun bleached paint, and highlights due to the way the surrounding light reflects off higer surfaces at a steeper angle.
I could be totally up in the night on this. I've had a couple of days of partial sleep deprevation (read that to mean, I'm WAY tired!!).
Bill
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DML M4A2 Red Army
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-- There is a fine line between "hobby" and "mental illness". (Author unknown)