free chair and a call for HELP!

back story-
A local library furniture builder/upholstery shop in my area is moving so I stopped by to ask if I could collect scrap wood and pallets. As the owner and I talked a man drove up and took all the scrap wood I wanted. I was assured there will be more soon and then we toured the shop.  They had auctioned off everything the day before and I am very sad I missed it! Antique furniture movers the kind going for $$$$$ online stacked all over... big steel wheels and perfect chippy paint.... sigh

Anyways, my eye was caught by a chair sitting in the corner. I commented on it and the owner said the chair was brought in to be redone but when the owner heard the amount of work to be done and cost they said to keep it. It was destined for the dumpster!

So I snagged it!

It is solid wood with metal seat springs that are hand tied. Most of the sanding is already done and the bare wood is beautiful!

Once again I am in over my head! Another project to do and the other ones not finished. Hubby is thrilled ;-)

Can ANYONE tell me how to upholstery this beauty? Do I need to add a "back" to support the material? How do I cover the seat? I would like to do something in dropcloth like Miss Mustard Seed's French chairs. I wish I could find grain sacks like those! WOW!