100% polyester Silver grey indoor curtain panel pair

We had these at our home for some months and we had just not opened the packing until it was time to change the curtains. When we opened the package to use these recently, we saw some spots and stains on the curtains ( pictures shared). Although I must admit the color looks beautiful and rich, I won’t be using these. I reckon the spots would be easy to remove using some spot treatment and by a handwash, but I just don’t have the time as of now. The curtain panels measure 8 ft X 4.5 Ft each.