The more wear on the blade the harder to make it look like new.
The hollower the grind the harder to make it look like new if the initial condition was not close to new as far as pitting and hone wear.
Mirror polishes on blades are not easy to get. Spotless mirror will take decent amount of work, and will require a buffer to achieve. For me the best look is the semi mirror that is produced in factory.

With experience the results get better and better also one can push further the limits of the restoration.