Most large scale name and number plates are etched, fine for the smaller scales, but the problem with etching is the undercut, thus the process only allows a depth of 10 thou or thereabouts, and is quiet apparent on larger scales, and does not do a fine model justice.
Using the magic CNC mill I cut the numbers and frame out of 30 thou brass with a 1mm cutter, then mounted them on a piece of 1/16” brass and filled a quarter radius on the edge, and they look the part.
Mike