[Tigers] ID Tag versus Dipping/Stripping

[Baker, Kent]

I am in the process of caustic dipping and acid dipping my 66 MK1A.  The shop
needs to know if the ID plate and/or rivots holding it to the car are aluminum
or other soft metal.  We are concerned the rivots will be eaten by the acid
and drop the ID plate into the bottom of the bath (gone forever) or the plate
and rivots will both be devoured.  I am sure someone has addressed this issue
before - suggestions?

Kent Baker