Hi,

Shredded paper would compost fine, but I have a sense it wouldn’t be great cover material for an indoor toilet. I haven’t used it though, so you could try and see! What does work well is wood chips. They are typically easier to get in a city then sawdust, and they are a good cover and keep odor down. They don’t compost very quick, so your finished product will still have lots of wood chunks in it, which isn’t a problem, just something to be aware of.  I have also used coffee grounds (you can usually get a lot from a cafe if you leave them a bucket), and shredded leaves.