Be careful with the internet ..........
Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer (not to be confused with polyvinyl acetate, a popular wood glue). ...
Poly Vinyl Acetate anyone?
One coat or two sir
http://en.wikipedia.org/wiki/Polyvinyl_acetate
both water soluble, the point...
Cowboys use it.
Your point, maybe - But when you set out your stall about being people able 'to back up their theory' and 'support your assertion',it would have been better made if you'd linked to the correct material .
The first line of your link says
" Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer (not to be confused with polyvinyl acetate, a popular wood glue"
So you
a - did not read the link you posted
b- you had no idea what the PVA being discussed actually stood for
c- did not understand what you read
Either way, not a great way of backing up your 'keep up and you may learn something' comment !
Why not just say - 'sorry guys, made a mistake with that link' ?
Both being 'water soluble' is not a very convincing wriggle, I'm afraid.
PVA has its uses and limitations. Using it does not make you a cowboy but, like most things, using it in the wrong way does.