It would seem to me that atomization would free any entrapped air.

"JGS" wrote in message
...
Hi BAD,
I did a lot of reading when I first bought my sprayer and all though I
never experienced it in person, one author mentioned "Micro bubbles" in
poly. These would be caused by shaking not stirring the mix and would
result
in pinholes. IMHO this James Bond kind on thinking is bull but then I have
been wrong before. Cheers, JG