Picks on hammered dulcimers
Adventures with 'other' instruments...
Coming a little late here, but...
When my wife and I play "Hewlett" (she accompanies me on MD), I play the first pass plucking with two guitar picks, and the second pass with hammers. I also have a pair of hammers with guitar picks installed at the end of the handles, and I play part of "Riu Riu Chiu" plucking with the picks. So far, that's all I've experimented with plucking with guitar picks. If your strings do not rest in groves across the bridges, you might have difficulty plucking them as they will move around on the bridges.