Hi [USER=136088]@Ja14[/USER]
There are various paths to take yet if you want minimal work there is a plugin that does a pretty good job with setting a few sliders. It costs about $50 and is From Lasersoft imaging and is the SRDx dust and scratch remover: sRDX Dust and Scratch Remover
Here is an screen shot that I used on you image with sliders and no masking. I had to be pretty agressive as the red areas show where it is going to process your image for corrections:
[ATTACH=full]117102[/ATTACH]
This is the resulting image after applying that one filter:
[ATTACH=full]117103[/ATTACH]
I think that is a pretty decent result for minimal work.
Now, you can do this with the Dust and Scratches Filter in PS and then mask that result with your original (a lot of hand work) so most of the image is not blurred. I also change some of the tone of the image with Adobe ACR:
[ATTACH=full]117104[/ATTACH]
I think the plugin does a better job.
To do even better, I would put you image in a Layer as a Smart Object, apply the SRDx filter and then mask the filter so the the areas with more detail that don't have the dust could show through yet that is more work.
If you have more questions on approach please feel free to ask and hope this helps
John Wheeler