Let me add my own little thing to this.
The clone stamp tool is quite old now, and i think is quite outdated (but not quite). If you are using Photoshop CS or 8.0 (and I think, also PS 7.0), then you can use the Healing brush tool.
Now this works almost exactly as the clone stamp tool, but is far more advanced. The healing brush tool uses the pattern or the detail of source area and pastes it onto the desired area "whilst preserving the lighting and shading in all its exactness".
I don't have to give the steps or anything else cause they are almost the same in both, the clone stamp and the healing brush.
The healing brush tool is much faster and more efficient than the clone stamp tool. Now, the clone stamp tool does come in handy but not in cases of photo restoration, especially, human skin.
The healing brush, as the name suggests, is very good in eliminating blackheads, spots, marks, and as the case is here, pimples...
- Select the healing brush by pressing J or by clicking it through the toolbox
Here is my final image:
And, nix, sorry I posted it here, but I just thought that people should know. I didn't mean to steal the show or suppress your efforts or anything like that.
Milind