Can be an interesting technique, you just have to make it work musically for you. The composer John Cage used it in some " classical avant garde" work for "prepared" piano. You can use screwdrivers jammed between strings, coathangers,paper clips, anything you want. The guitarists Derek Bailley and Henry Cow's Fred Frith made a full time career out of it on the "free" jazz circuit for the last 30 or 40 years 'till they both died, although I don't think that was the reason for their seperate and unconnected demise.
Have fun, experiment.
