Doing the Piero Course, when it comes to paint the textures in the model direct in the Texture Paint mode, when setting the Face Selection Masking for Painting, the overlaping wire frame won't show. Some regions like the eye and the fingers of the model show white lines that resembles the wire but only in these regions:
Is there a additional configuration that I'm missing so I can paint with these wire outlines? The .blend file is in this link.
Edit: Packed .blend file with textures and updated the link.