The enamel plate was heavily corroded. All loose corrosion was removed with glass bristle brushes, and the areas free from enamel were converted with 5% tannic acid in IMS (Industrial Methylated Spirit). The iron staining upon the enamel was removed with a chelating agent saturated in cotton wool poultices.

Once the staining had been removed the all residues were cleaned with acetone, and the exposed core areas lacquered with Paraloid B72