Im’e not the expert, but from what I know the following applies.
I know piston engines components can be reused as long as they are within tolerence and after that are scrap or can possibly be reworked/plated/reground to give them more life.
With turbine/turboprop engines many components, blades and discs etc, are lifed at which point you have to scrap them. Sometimes lives can be extended which is usually the result of in service experience ie none failed or showed signs of failure at 1000hrs so they are re-lifed to 1200hrs. But with historic aircraft I doubt this applies very much as the numbers in use often limited.

Richard