+1 on what Yooper said. Yeast make the wine. Enzymes are usually referred to in mashing for starch to sugar convergence. I think if it's considered pasteurized then adding the yeast shouldn't be an issue.
Natural grape soda sounds awesome. I'd do it!
Camp Brew Co.
"If you've heard this story before, don't stop me, because I'd like to hear it again."
I'm couch surfing in the middle of moving. Will brew soon!
Keg 1: Empty
Keg 2: Empty
Bottled: Bourbon Oak Brolic Strong ale
On Deck: Ava ale, Red Ryes ale, Priceless Pup Brown,