There is a number of people using SmoothKit just for what you describe.
There is a few ways with SmoothKit to do that, however there is not a plugin called "SmoothSkin and go"!
Our support page http://revisionfx.com/products/smoothkit/support
explains something related with SmoothKit Gaussian Per-Pixel, but sometimes SmoothKit Diffuse works better. If you have a single frame you want to test made with that camera in a typical lighting context as you will use it, I can set it up for you and see what works best.