I'm still working on basic techniques (after all what good is mastering thinning when you can't even yet draw a straight line) so this was an attempt to use the digital camera to notice the mistakes that I could not see even with the magnifying glass.
Brush control will come with practice, so keep at it. Try to clean up the flash (like on the tip of the axe, the girl's feet) before you prime too. I see from your gallery you are still pretty new (at least to CMON) - you will improve and gain new skills as you go.