I've had an aerosol 'Air Duster' for a few years, which I've found handy for blasting the dust off computer keyboards, etc.
It's just run out, and the thought occurred to me that I might be able to refill it from my compressor. I can certainly get some air in by holding the operating button down and holding a compressor nozzle against its nozzle - but that then only allows it to operate for a few seconds.
Anyone know what these things are originally filled with? Presumably some gas which can be liquefied by compression rather than air - otherwise it wouldn't hold enough to be useful.
In that case, is it likely to harmful to anything it's sprayed onto? The can (Maplin) doesn't say what was in it.