I often buy clocks have suffered long time abuse and the works often have a substantial amount of rust and other crud that is difficult to get off. I saw the use of this method in a comment made by Jerry Kiefier so I have to give him credit for the idea. I'm using a AEC Air Eraser with a very fine media to get rid of hard core rust especially in the lantern pinions and areas that can't be reached for cleaning. This of course is a last resort method where nothing else is going to do the job. With hard core rust, chemicals, wire brushing, and vibrator polishing have limited value if any at all. The first picture shows a wheel and lantern pinion that has been through the standard chemical, wire brushing, and polishing and the rust is still there. The second photo shows the same wheel after using the blaster with a 320grit media. The third photo shows the wheel after using a soft wire wheel to get a bright finish. The rust on the trundles, sides and bottoms as well as the arbor inside the lantern is gone. The last shot shows the blasting set up I'm using, with a pressure regulator, a particles filter, a water desiccant filter, and the blasting gun.