Worn off serial number

LAA

Well-known Member
I have a piece of equipment that has been damaged by metal
to metal contact and the serial number was wore near about
off. I know what the serial number is but need to prove to the
vendor that this particular piece of equipment is the piece
warranted. The serial number was hand stamped into the
metal but was not very deep, right now it is partially visible but
really sketchy, I have tried magnetic particle crack testing to try
and high light the number and used dye penetrant crack
checker, the dye penetrant worked the best so far and we
were able to get pretty good pictures of 3 digits. Does anyone
know of any other non destructive testing or process that may
high light or raise a real faint stamping? I remember pipe
inspectors using black light inspection years ago but don't
remember exactly how that process worked and whether that
process found smaller cracks,
P
 
Pretty sure the cops have a way to do it like in cases where the numbers have been ground off of motorcycle blocks for example...the stamping of the number changes the density of the metal underneath it.
 
State Police Technician used a torch to heat the area where a number was ground off of an engine block on a stolen truck, but that number was cast and the letters were raised instead of stamped. Don't know how it would work with stamped numbers.
 
The cops bring it to the Harley dealer . A silicone dam is made around the ground number area then acid is put on the numbers pad . If the theives did not take a punch and further distort the metal the old missing numbers will come up in the acid. Theives knew the test and distorted the pad . The test never worked to bring up numbers.
 

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