How can I make a cylindrical outline to a mesh (2.9) I am modeling a cello in blender 2.9, and I have finished modeling the basic shape of the cello (see image below)

However, to make it more realistic I would like to add a slight 3d outline to the mesh like on a real cello.  (example seen below)

As shown in the example above I would like my cello to have a sort of cylindrical outline around the whole side of the mesh.  I know I could just make a cylinder and start extruding it along the edges, but that would be tiresome and take forever.  Does anyone know of a faster way to go about this?  Any help will be appreciated! :)  (PS, I will leave my file below for anyone who needs it)
One way of doing this would be to start with your base shape (this is an obviously simplified version):

Use insets and/or edge loops to give a &quot;seam&quot; to your edges.

Select the &quot;seam edges&quot;, right-click and select &quot;Extrude Faces Along Normals&quot; and drag the mouse to bring out the edges to your desired depth. You may also want to check &quot;offset even&quot; in the operator panel in the bottom left corner.

Once you have the desired width/depth to your &quot;Seams&quot;, add a Subdivision Surface Modifier to round them out. Don't forget to shade smooth.