I was mostly just joking. Alclad is a paint that gives a natural metal finish (NMF), you can emulate an almost mirror-like polished metal finish. So theoretically you could paint the object in alclad, take it outside at sunset or sunrise and take a photo (assuming want the "horizon" look to your
NMM, if you want a more "point source" look then you could use a spotlight/torch/flashlight or something).
For example, if you wanted to paint a
NMM Saurus, you could use the images below as a guide as it's painted with a highly reflective metallic (though my "horizon" is somewhat corrupted by gumtrees

).
But I think people usually want "artistic" when they do
NMM rather than "realistic", so it's probably not that useful.