The method of grinding the skin is very efficient and practical if the precision is not very high. Train of thought: remove slightly larger flaws with a healing brush, then rub the skin with the skin filter, then sharpen the local area and strengthen the local light and shade.
1, PS good habit ctrl+j copy layer.
2, first of all, the face of the more obvious stain acne treatment, with decontamination tools or imitation stamp tool to see which one you like.
3, do a USM sharpening, the value of looking at the preview, enough.
4, ctrl+j copy layer to get "Layer 1 copy" to the plug-in portraiture, make sure to return to the layer to add a white mask, with a black brush tool to erase parts that do not need grinding: such as eye eyebrows, lips, hair.