When metal artifacts need attention, French turns to the fillers and abrasives in this cupboard. Fuller’s Earth, a naturally absorbent colloidal clay, acts as a poultice to draw out contaminant. Glass microballoons mixed with a resin can fill pits and scratches. French used these to fill losses to a Bronze Age ceramic burial urn. Calcium carbonate, a white, powder that, when mixed with water or a solvent forms a precipitate to remove tarnish from silver or silver-plated objects. Gamma and Alpha Alumina Powder are abrasives to remove tarnish from metal objects.