**2. Materials and Methods**

#### *2.1. Samples from the Krater*

Small samples were taken from the krater from areas of restoration with and without alteration and prepared as cross-sections allowing for the stratigraphy of the layers to be observed and analyzed by SEM-EDS. Additional small fragments of the paint film from degraded areas were collected for analysis by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, pyrolysis-Gas Chromatography Mass Spectrometry (pyrolysis-GCMS) and Scanning Electron Microscopy with Energy-Dispersive X-rays (SEM-EDS).

#### *2.2. Samples of Paint Used for the Conservation Treatment*

Paint used for the conservation treatment, Golden Heavy Body Artist Acrylics in C.P. Cadmium Orange and Titan Buff, were prepared as paint outs on glass microscope slides. The paint films were analyzed by X-ray Fluorescence (XRF) spectroscopy, FTIR, Raman and pyrolysis-GCMS.
