Translucent masking tape, a VERY sharp razor blade, and a steady firm, gentle hand.
Place the masking tape over the trades, with a razor (watch the wrists...) trace the trades and remove the excess paint. When you've covered them all. Spray the gun. Do several coats and let it dry between coats for one day. Remove the tape. Now you have see through trades on a "black" gun. lolz.
Ár skal rísa, sá er annars vill
fé eða fjör hafa. Sjaldan liggjandi úlfur
lær um getur né sofandi maður sigur.