Maybe it seems that I use a lot of new parts... well I use a new part if it is unreasonable or impossible to restore old one. In cases where it is possible to refurbish a existing part to look and function as a new one, I'll definetly do that.
For example these exhaust manifolds:
after sandblasting (left one):
additionally cleaned with rotating wirebrush:
covered with ceramic header paint:
...and the result