I'm a mariner and have had to polish more than my share of brass. Youre piece doesnt look to be that bad off. If brasso isn't cutting it then try Nev-r-dull. Comes in a blue tin.
If theres oxidization and bad discoloration then you can mix up a packet of grape kool-aid (don't add the sugar)...
WVMJ,what yeast do you prefer for your strawberry wine? I would like to make a few batches of strawberry come spring and I think your variation sounds pretty good.
I'm not sure. Sorry. I only have wild muscadines on my property here on the FL / GA line. Those are the only ones I can identify. I don't know where you live but if you can find your nearest agricultural extension office take the pictures and some clippings with the leaves and a few grapes in...