I have sprayed both and can't tell much difference in the final results. I
do find that water based is a lot easier to work with and seems to be a
little more tolerant of thinning. Clean up is a lot easier with the water
base and the cost of the waterbase is off set by the lack of special
solvents for clean up and thinning.
Before I read I wasn't supposed to spray oil based poly, I sprayed
many quarts of Minwax poly. Never had any real problems unless I
opened the fluid nozzle to big and tried to carry to wet of a coat.
Runs, but that's not the fault of the poly, but the operator.
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