“…The choice of treatments was based on previous field experience with them: MTMOS with and without addition of Acryloid B72 had been used to treat some Egyptian limestone bas-reliefs [1,2] and the mixture of Dri-Film 104 with Acryloid B72 was used extensively in the restoration of the Church of San Petronio in Bologna [3] and other monuments in Italy [4-6].…”