Ever thought about using (video) cassette tape for a crochet project? It is smooth and soft and got a distinct metallic color. Apparently, it isn't such a good idea though.
Splitting yarn is no big deal, if it is just a minor piece. However, one day you might need to split more and need to know, how to avoid a big messy tangled ball of yarn.
Some DIY pages have omitted a few details about splitting yarn. I've added these points to this guide.