Creating a hollow model with MeshLab is not about repair issues, but it is about the modifications necessary for proper preparation of a model that is intended for a commercial 3D printing service. Most of these services charge by calculating the volume of material required to print the design. In this case, by making a model hollow, it will decrease the volume of material necessary and greatly decrease the cost of the print job.
You'll need MeshLab and the support test model we made in Chapter 6, Making the Impossible. It looks like the following image:
We will proceed as follows: