Hi all, that's s my 1st tutorial ;-D
1. Open your scanned dirty image
c_1.jpg
2. Goto menu File->Save for Web->.... and save it as 2 coloured gif
c_2.jpg
3. Open it, and convert to RGB (Image->Mode->RGB Color)
4. Correct picture by Eraser Tool, Brush Tool etc
c_3.jpg
5. Use Stamp Filter from Filter Gallery (it takes interesting anti-aliasing effect)
c_4__stamped_.jpg
6. This layer must be on the top in multiply mode
c_5.jpg
7. Use Magic Wand Tool (shift_click) to select all pieces of body
c_6.jpg
8. Expand selection by 2
9. Fill selection by Paint Bucket Tool (in new layer)
c_7__solid_body_.jpg
10. Replay operations 7,8,9 to other objects (in new layers)
c_8__colored_.jpg
11. Draw shadows (in new layers) color for shadow is in ~5mm below from original color in Color Pickeri'm used Polygonal Lasso Tool and Paint Bucket Tool for making shadowsc_9__shadowed_.jpg
hope u like this tutorial 