If you use an air compressor even with a water/oil seperator...be aware there is still much moisture in the air stream! Dry air is only had if you can remove the "heat" from the air. This process leaves the moisture behind in a collector. Canned air is expensive and a hassel to use...but it is dry.
Compressed Air Cleaning of Electronics
Quick question. Do you know of any compressed air source to clean dust out around electronics that does not cost an arm and a leg like the compressed air cans used for cleaning the inside of computers? For example, maybe some sort of device that can pumped up with a bicycle pump and reused?