I created a model in parts to print using sculptris and blender, i enabled the 3d print tollbox addon, and when i click in check all, my model has only two problems that i coudln't find a solution anywhere, not even on posts here. First is the zero faces, i tried all the options in the CLEAN UP menu, tried triangulate boolean, tried selecting the button "make manifold" and every time i check with the 3d toolbox the same number of zero faces appear. The other possible problem is the overhang faces, but i think that to solve that i should create a support below the model. I imported my model into the program MeshMixer, and selected "analisys" and "inspector" and clicked in some of the options like "auto repair all" nothing happens with the model, the program says that it doesn't have any erros, but blender detects the zero faces. What should i do to fix the zero faces with a big 3d model?
Here is the link to download one part of the model: http://www.mediafire.com/file/le73t6or2tscs4e/Model.blend/file
When i import the model to a 3d print program like CURA, it says that isn't manifold, even before opening the model in blender and clicking at the option "make manifold". The error message appears just before entering with the camera inside the model.