I had a few little quirks in the paint (apparently "impacts" of small stones). The are very well covered by the pin. If you look closely, of course, you see the improvements. Since I had not expected anything else. But still better than the previous "white holes" (primer).
For larger areas of the pen is of course not intended. And in a "brand new" vehicle to a proper paint is recommended. But for small repairs of the pen is working properly. How durable is the whole thing remains to be seen.
Small note: In the varnish bottles is still a "rust eraser" placed, a kind of tiny wire brush. I rather not try.