Sjamboks? 4 rhino hide whips

[katana]

Thanks for that.
The whips still are tagged and state Rhino, however, two are a 'dirty' cream colour, the other two very dark greyish/black colour. So unless the hide is coloured some how, it suggests possible two differing hides. I will try to post photo's soon.
A couple of the whips are 'age hardened' can anyone suggest how I can soften them so that they regain their flexability. Would 'leather feed' be a good idea? Or soaking them in oil (vegetable?)