Reverse engineering sw

[JSenior]

Difficult to understand the complete workflow.
In that perspective you suggest we need to use a CAD and remodel from scratch the object, using the mesh just as reference to ease the work.
I suppose this is just fine for mechanical parts with easy geometry, made from a mixture of solid primitives.
But with more complex objects such as eyewear or the propeller will be not better to have the full mesh, using specialized tools such as VRMesh Reverse, 3dreshaper Meteor and SpaceClaim to first reconstruct the complete mesh and next model a complete solid using semiautomatic generation tools that will use the complex mesh as guide?

Have you got an image of the eyewear you can share?
For most reverse engineering applications (depending the reason for RE and the data format they require) you're using the mesh as your template/guide and cleaning the mesh serves little to no point. It will only make the data less accurate.