When you say the skin can be fixed in PS, how exactly? I am having a hard time fixing the issue while retaining detail.
"air brushing" / skin softening can be a very complex subject. There are many people working full time jobs as 're-touchers' who spend most of their time doing just that....and I'd guess that it takes them a long time to master their craft.
If you Google 'Photoshop+skin' you will have more reading than you could ever do. Video tutorials are probably a better introduction, and there will be many thousands of them out there.
One of the issues is that it can be done via several methods. Some of them taking just minutes and not requiring much knowledge...others that can take hours and require a high degree of expertise with Photoshop. So the first question is: what sort of results are you expecting?