Crimea_River
Marshal
.... my eyes aren't what they used to be. Having some trouble finding them though.....
Touch your nose, then run your finger up the bridge of your nose toward your forehead 1 to 1.5 inches then do a 90 degree turn to the right or left. Continue running your finger along that line until until you feel a sharp discomfort. That's one of your eyes. The other is to the opposite side.

Ahem. Nice work on the pit walls Greg. If that's your first airbrushing job you've done extremely well. I never would have known.
An essential tool for dials and knobs is a very fine brush which you should be able to pick up at a good art supply store. Keep up the good work!