If the judges are absolutely sure that the orginal only had one kind of covering and the model in question was something else,or some other change from the "original" and even if fidelity points are not used, judges have the option to reduce appearance points. I have seen this done on several occasions.
In one way, I can understand the concept of "fidelity" points for the classic event. However, there are no guidelines regarding how far "fidelity" to the original is to be judged. One opinion might have it that to be eligible for any fidelity points, there should be some presentation with documentation showing photographs, construction drawings and power train used on the original, then the judges have some basis to award any fidelity points. I am sure the drafters of the classic rules did not intend to require such documentation or to even think about it, but my question would be to them, how else can a judge award fidelity points on an equitable basis from one model to the other. Thus, my opinion above that when "known" deviations from the original, be it construction, shapes, paint schemes or whatever, judges can deduct appearance points.
Do not bother with sending bomb shells. That is my opinion and no argument will change it.
Keith