Hawkeye, because my engilsh is still not so good
I've decided to give you some step by step photo ilustrated taping manual
I first mask everything. dont want the paint go where I dont want it to go
1. The crossed paper simulates the wing. Take a pencil and draw (very lightly) lines of shape you whant to mask.
2. Take a peace of vinyl tape (for vinyl graphics, bilboards etc.) and position its straight edge as along one of the line you drawed on the wing. (set the corner very precisly). mark on the vinyl where is the second line drawed on the wing.
3. Cut the vinyl with sharp razor.
4. split the vinyl (not the thin corner, just opposite) and cut off its bottom.
5. Posiotion the vinyl triangle on the wingand if satisfied stick the end of it to the wing
6. slowly push out the vinyl bottom, doing it you will stick the rest of the triangle to the wing.
7. no comment (all glued)
8. mask the rest of wing using yellow masking tape or paper
9. ready for painting
I hope this help