Just watched an interesting video of these guys testing a 3d printed piston in a 2 stroke Polaris quad.
https://www.youtube.com/watch?v=LyI3KWMWbB4
If they would've annealed the PC-CF it would've gotten more life, or if they would've used PPA-CF and annealed it, they would've doubled the Tg vs the PC-CF. PPA-CF and PC-CF are also both machineable, so they could've produced more refined pistons had they wanted to.
They did a concrete piston too.
https://www.youtube.com/watch?v=6ji9ENw2wBc