As you can see, the textures I created are very simple, something anyone with some knowledge on V-ray could achieve. Basically it was materials composed of 2 or 3 layers and the basic parameters of reflection, glossiness, and the other channel materials.
By having simple pieces, the unwrap fitted perfectly. The most tedious of this process comes when one has to unwrap a complex and weaved grid, it can sometimes ruin a work that took long time to make. Sometimes its better to simplify the grid and take advantage of good maps to give the detail.
This is the final result of this piece, a simple metallic piece with an opaque tone, which was what I was really wanted for this part.