I have a paper from Journal of Forensic Sciences from somtime in
the mid 70's (presented at the 42nd Semiannual Seminar of the
California Association of Criminalists, 19th Oct 1973) which is
entitiled;
"The restoration of Obliterated Stamped Serial Numbers by
Ultrasonically Induced Cavitation in Water".
Maybe this is of some help?
Dr. M. J. Ponting
Research Officer (Archaeological Materials)
Department of Archaeology
University of Nottingham
University Park
NOTTINGHAM NG7 2RD
Tel: (0115) 951 4815
Fax: (0115) 951 4812
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