Geoffrey Reed wrote:
  That is why I have a oil and water separator on the
output line of the
 compressor we have here at home, as well as moisture absorbers on the
 blowguns I use to clean PCBs and other electronics. 
Is that a homebrew device or something that you bought? I've not used my
compressor for things like PCBs for just that reason - it does put out a
little oil, along with quite a lot (relatively-speaking) of moisture.
cheers
Jules