16 March 1998
Reason for treatment
. . Clean to remove tarnish. Relacquer if necessary. Discuss tarnishing problem with Conservation research.
67466 march 98 FNS. Slight tarnish.
Removed with Industrial methylated spirits (ethanol,methanol) on paper tissue. Areas of black tarnish in detail cleaned using Silvo (cotton wadding, white spirit, Newburgh chalk, china clay) and degreased with acetone.