Okay... now you got our interest... What is the 20 year old show car?
Also, the word glaze
is used in so many ways and can mean a number of different types of products... some are abrasive, some are not, some are in fact waxes or sealants.
From a body shop point of view, kind of the place where the term originated, it would mean a non-abrasive polish with the intended purpose of maximizing gloss, richness of color, D.O.I., reflectivity, depth...
If the paint is a modern clear coat and it's not 100% swirl-free under bright light, then a better approach would be a very light finishing polish machine applied and then apply your wax.