you can bow cymbals, Crotales, gongs, vibraphones.. I have been known to bow water goblets, glass light fixtures, glass bowls, cowbells, saws, etc. there is much orchestra literature written for bowed percussion…
in college I played a piece with bowed saw and a theremin next to each other.
cymbals (best with cello bows) have the most unpredictable/ atonal overtone set. while vibes and crotales are much more predictable and usable in pitch and melodic content. gongs are very slow to respond, and need a bass bow.
that said crotales are way too expensive. I want an octave or two, but don’t have the cash right now…