As a cost saving initiave (ok, i know its expensive to begin with), and also as a sort of green idea, im looking at buying a mini air compressor to save having to buy compressed air cans, which then have to be thrown away
I ideally want something fairly quiet, and portable - so it doesnt have to live in the garage, and i can take it about with me if needs be
Ebay searching mini air compressor, brings up like ones used for modelling, nail art, airbrushing, that sort of thing
I would've thought that that would be fine for blowing dust out, with a HP pipe, and an airduster/blower attachment, but others dont seem to agree..
When air is compressed the dew-point drops and moisture in the air comes out of suspension, however when we reduce the pressure it tries to raise the dew-point, this is why you sometimes see frost on the neck of a air bottle, the air will be full of saturated moisture. I realise that you are not talking about industrial size machinery but the effect is still valid on any compressed air system to a greater or smaller degree.
Consider this, for every 100cfm of air compressed to 100psig over a 24 hour period will generate 15 gallons of moisture. This moisture will be discharged into your compressed air system as the air cools.
If you are to use compressed air you would have to fit filters and driers. You also should be aware that at high speed air is can create static electricity.