Looks fine Paul, I'd go with the streaking with some directional weathering you know. 

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Wouldn't worry about the stripe Paul, as you know those squadron/group IDs developed during the war. the red nose was probably standard ID Marking and the stripe was added later for more style. Who's to say this bird always had the stripe?
Guess you've seen this?
http://www.368thfightergroup.com/