From a practical point of view, why put a wax over aplastic...especially if it will receive some “wear and tear” e.g. babiesteeth.....and then, why use a synthetic petroleum product when there are healthier,more sustainable and natural products onthe market?
Re putting oils on veneer or similar... It will be dependanton the level of “penetration” and the veneer thickness up to the first gluelayer. Just oils, with no resins or waxes etc are thinner and may penetrate tothe glue layer that can then cause delamination. Oils with some sort of thinners,the same thing as one is only diluting the oil..which will mean that thethinner will be the one that may actually cause the delamination. Penetratingoils does not necessarily mean they will penetrate mm into the substratehowever they will connect with the timber pores, unlike varnishes thattypically sit on top of the timber due to the large molecular structure thatdoes not allow penetration. It all depends on the thickness of the veneer.