Grey heavy-duty muslin photography backdrop

I was a professional photographer at some point (I suppose I still am, but not at the "need a muslin backdrop" level). This muslin backdrop would have been used for pets and families in an indoor non-smoking setting; it has been crumpled up in a bag for around 8 years. It has NOT been washed, because it's hand-painted. It's heavyweight, and comes crumpled in a bag. The design is actual paint, and the fabric has no obvious damage. I'm estimating 10x10 feet, or 10x12 - it's a standard size, at any rate. Perfect for a photographer doing portraits. It could likely be pressed and rolled, but I don't have the ability to do so.