Chiara Boni La Petite Robe Artico Cocotte Illusion Sheath Dress

Blue ponte (72% Polyamide, 28% Elastane). Three quarter sleeves. Boat neckline. Step in and pull up style. Sheath. Partially lined. 40’’ from shoulder to hemline. The front panel has a stain that looks like a water spot. I have not been able to get it out with spot cleaning. I haven't tried dry cleaning.