Quote:
... I believe the pressure diferential between the top of the trailer and the bottom created a draft drawing the dust through the trailer ...
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Now that's an interesting thought! In many industries and applications, the technique used to prevent infiltration of dust or gas is to provide positive pressure inside the space to be isolated. Think biohazard suits, etc. I don't think it would be too hard to mount a small HVLP blower in a TM to keep dust out...
Lemme think about that ...
Bill