 After extracting samples from the faces under the house owners's permission, Gracenea proceeded to analyze them and concluded that the images "weren't made with paint" and "according to scientific knowledge and techniques employed in the analysis, there is no external manipulation or elements" in the faces.Alamancos then attempted to reproduce similar images through the variety of methods considered valid in previous investigations, including but not limited to concrete solvents, hydrochloric acid and silver nitrate.He declared failure in his attempt to replicate the faces, concluding "the words summarizing his opinion are absolute bewilderment."