I've found some sheep and ?fox skulls, spines and other bits and pieces, while out on a walk - the bones are generally white but stained with dirt, grass etc. Some still have bits of ?ligament attached. I'd like to get them as pure white as possible to photograph them as part of still lifes. So I think some sort of soaking is the way to go.

Computer says hydrogen peroxide is the stuff to use but for the quantity I need (~a half to a bucket full) is too expensive if bought retail.
I tried a local hairdressing place that says they do wholesale but no joy. I'm trying cola (Tesco) but not doing a great job.
Bleach is said to rot the bones.
Any ideas that are economical and effective?

Computer says hydrogen peroxide is the stuff to use but for the quantity I need (~a half to a bucket full) is too expensive if bought retail.
I tried a local hairdressing place that says they do wholesale but no joy. I'm trying cola (Tesco) but not doing a great job.
Bleach is said to rot the bones.
Any ideas that are economical and effective?