When one part of the structure is straight and the other rounded, cut a strip of kraft paper to the desired length (or several small pieces). Glue half of it on the rectilinear part. Notch the second part and glue it on the rounded part.
In this second example, for convenience, you can notch the second half of the kraft tape before starting to glue it.
When the two parts of the structure are rounded, it is necessary to notch the two halves of the kraft strip, taking care to offset the cuts.
