I'm sure you know this but, if you apply a tinted clear to the stripes to darken them, it will have to be done after they have been laid on the tins.
That being said, a green tinted clear will be greatly affected by the base color of the stripe used. So if you use a black carbon stripe, the green will be very, very dark. Almost to the point that you may not be able to tell it's green. If that's not the effect you desire you will want to use a medium green, medium grey, medium gold as the base stripe color. Also the more coats of clear applied, the darker the color will become.
With that much build up of stripe & clear there will be a very pronounced hard edge line & the only way to get rid of that would be to re-clear coat the entire panel (stripes & all) with multiple coats of clear, letting each coat dry enough to sand edges between coats to "bury" the stripes.
Just wanted to make sure you knew this before spending $$$$$