Paintings/sculptures made from recycled cassette tape
Flickr user iri5 has an impressive series titled ‘Ghost in the machine’ of portraits of well-known musicians (such as Jimi Hendrix, Jim Morrison and Ian Brown, …) made from recycle [sic] cassette tape.
I suppose you could do them with eight-track tapes, but only for artists from before like 1976…
The film reel with Marilyn ain’t bad.