Hi itty-bitty,
Welcome to
RP!
... I also work with Photoshop only so, I stopped with my 'restoration' just about where Noel did...
I also used the Levels (on each individual Channel) to brighten up the picture and bring out more details ....
I desaturated the picture ... and only used the Dust&Scratches Tool to start cleaning the girl's face ....
Hope somebody using
PSP will jump in and help you more ...