Yes tones, i mean a single session. It can be demonstrated by hammering copper aswell, at first it is very malliable but quickly becomes less so and need anealing to carry on shapping with a hammer. So this is not age related, it happens by being worked. I would be interested to know how this happens, if you do find out.

I like horse poop aswell mate, but i prefer it in my veg plot, works wonders with me brassica's!