a method of coating an electroplating rack used for supporting non-conductive substrates during a plating process. The method comprises the steps of contacting at least a portion of the electroplating rack with a plastisol composition, the plastisol composition having dispersed therein an effective amount of an additive having the structure: Formula (I) wherein R, R', R" and R'" are either the same or are independently selected from the group consisting of benzyl, substituted benzyl, phenyl or substituted phenyl; or :Formula (II) wherein R, R', R" and R'" are either the same or are independently selected from C I - CI O alkyl (either straight or branched chain), benzyl, substituted benzyl, phenyl, or substituted phenyl and M is a divalent metal cation, preferably selected from the group consisting of nickel, copper and zinc; and heating the electroplating rack with the plastisol composition thereon to a suitable temperature and for a sufficient time to cure the plastisol and form a solid insulating coating on the electroplating rack. The coated electroplating rack may then be used for mounting non- conductive substrates for subsequent metallization steps.