What is the feasibility of using graphite, particularly variants that are easy and affordable to acquire, in a combustion chamber, nozzle and bell as well as nozzle extension? Does it need reinforcement with some lighter material? How does it ablate, or for that matter, does it ablate at all or does it oxidize, and if so what can be done to prevent oxidation.`Does it work as higher pressure or is it just limited to low-pressure amateur engines as I've seen previously (was unable to find link, may have been taken down as the website hadn't been updated in years since I last looked)?
As well as this, how could such a technique be implemented in an amateur rocket engine with limited manufacturing methods?