How to put the tape line
First you need some talcum powder from the pharmacy. If you want, you can spray it with a color spray beforehand.
Look at the picture above. Red is a flying direction
Put the wing on a table with aileron slightly down and stick to the green zone.
The next step is to sprinkle the aileron with some talcum powder where the tape should not stick. And that is all. Your tape is ready.