Electrum works better than gold -- allowing her to get the glasses pretty thin, if not yet down to wire-frame sizes.
Invar seems like it should work really well (and it almost beats gold), but the concepts are too ... bendy, for lack of a better word. If they were just slightly stiffer, they might click into place the way these ideas did with platinum.
Iron works about as well as stone, actually. Better than copper, otherwise not remarkably special.
Bronze performs similarly to brass, but slightly worse overall.
Tin works somewhat like platinum -- the magic does the same 'clicking' into place -- but it's much easier for magic to work itself loose, so it ends up being comparable to steel.
Nickel doesn't quite to the same thing. It ends up being even worse than copper on its own.
Zinc doesn't have special affinity with the magic at all, but it does do a bit better than copper. Something about it feels smoother than some of the other metals.
To summarize, her researches have produced the following ordered list of compatibilities for this specific magic: nickel, copper, zinc, titanium, stone, iron, silver, bronze, brass, steel, tin, gold, invar, electrum, platinum.