With the removal of the areas with neutral colours of the whole of the lower part, different layers appeared of between 1 and 2 mm, which ended up flattening the original painting.  The different layers are of very varied nature (animal glue, whiting, pigments, different resins, etc.). which provoked the fact that the tension between the polychrome and the neutral-coloured areas became evident and had caused cracks and the raising of the pictorial stratum.  

The methodology used is the mechanical removal with scalpel and controlled humidity with deionized water.