"Two complete knees". I'm going to sculpt one cetral piece, make a mould of it then cast two resin copies. This will then give me all the pieces needed to construct the knees and mould them as single items, just like my Boba knees.
Not metal, but coldacst. It's a process of mixing aluminium powder with resin and then it can be polished to reveal the metal powder. This is how the screen used armour was made.