[Convert brush contour completely to outer contour]

In the meantime I found the answer in the forum.
https://forum.affinity.serif.com/index.php?/topic/83556-convert-vector-brush-stroke-to-curve/&tab=comments#comment-440568

[Convert brush contour completely to outer contour]

Is it possible to convert a brush line to an outside line in Affinity Designer? Currently I control a brush outline using a centerline. Unfortunately, when I have to pass this data, the printing company only receives the control line.

Thank you very much!