xxxmen,
Welcome to RetouchPRO!!
Beside what already mentioned here, you could also try with Neat Image (a free noise removing software downloadable
here) or the: Dust&Scratches, Median, Gaussian Blur, or Surface Blur Filters.
In my example I used the
Filter> Blur> Surface Blur ...
I've left some fine hair on the upper part of the arm to make it look more natural..