Great work so far . As for the weathering question , the simple answer is it's a matter of taste ! I don't think you can over-do it , as when I did my Viper I initially thought I'd done TOO much , but was very surprised when I referred back to the show as to HOW much weathering the Vipers had . Basically , the earlier in the shows run , the less the weathering/damage . The real question is whether or not you're brave enough to dirty up your lovely clean Viper .