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David - I don't know how JJ executed her star removal, but heres a quick idea of how I do it...
Using the ”Dust & Scratches” filter, with the radius set to 12, and threshold to between 45-150. (I judge this by looking enlarged image. Set the threshold so that the center of the brighter stars disappears, but the image stays sharp) Apply this filter.
Then lower radius two points to 10 and set Threshold to between 30-80. Again, use the enlarged image quality and details as a guide.
Repeat several iterations with lower values. More, finer iterations produces a better result than fewer aggressive iterations.. In the last iteration radius should be 1 and the Threshold between 3-10.
If there are leftovers from brighter stars, use the clone tool or the spot healing brush to remove them.
Generally, i find there is sometimes some faint artefacts left after doing this. If this is the case, usually a selective blur will tidy it all up..
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