Bar ends go in the scrap metal bin, and derailers go in the parts box. somebody will want those someday whan someone gives them a nice singlespeed bike conversion and they want to actually ride it up hills and stuff.

How do I know this? Well it's spring, and down at the bike coop we've been doing a brisk business putting derailers back on nice old road bikes that had been converted to singlespeed. SO whatever you do don't throw those derailers out, don't turn them into "art". If you you don't want them give them to someone who does. There are tons of great old bikes in the world that make good reliable, inexpensive transportation as long as used parts are still available to keep them going.