Well I did a search for "star bloat reduction" and found out how to use the minimum filter ... gave it a try ... with a bit of tweaking to get the settings right this is what I came up with ... I've only applied it to the web image.
Very handy process
Here's a link to the web page that told me how to do it for anyone else wanting to give it a go .....
http://www.astronomy-images.com/Arti...star-bloat.htm
I've posted the original and minimized versions so the effect can be seen.
Thanks for the suggestion Frank .... I'd seen others talk about it on the forums but had never tried it myself.