So, woken at 5am by a humungous coughing fit for no reason, I am bored and cannot sleep.
I somehow ended up with a pad of this stuff called "stone paper", which is supposed to be super environmentally friendly but anything made out of HDPE and crushed rock can't really be that friendly. It writes smooth, but will annoy you eventually because the ink will smear eternally, never sinking in.
I realized it could be used for scratch painting without the special coating scratch painting usually requires.
The camera murdered it.