Ah, the classic tale of a manicure gone rogue, leaving a vibrant, unwanted masterpiece on your precious velvet sofa. It seems you're not alone in this predicament, as the provided links show others have cried out into the digital void with the same problem, though they didn't exactly get a solution back. Fear not, for this is a rescue mission, not a funeral for your furniture.
First, take a deep breath and step away from the acetone. Pouring that on velvet is like giving a kitten a bath in a hurricane—it will only end in tears and a ruined texture. Your primary weapon here is non-acetone nail polish remover or rubbing alcohol. But before you go in, you must perform a secret test. Find an inconspicuous spot on the sofa, like the underside of a cushion, and dab a tiny amount of your chosen solvent with a cotton swab. If the velvet doesn't discolor or throw a fit, you have the green light to proceed.
Now for the main event. Do not pour the remover directly onto the stain. Instead, apply it to a clean, white cloth. Gently dab the nail varnish stain, working from the outside in to prevent your little problem from becoming a big one. Blot, don't rub. Rubbing will just bully the polish deeper into the fabric and crush the velvet's delicate pile. As you dab, the polish should start transferring to your cloth. Keep switching to a clean section of the cloth and repeat the process with the patience of a saint.
Once the villainous varnish is vanquished, you may need to do a little cleanup. Mix a drop of clear dish soap with some water, dampen another clean cloth with it, and blot the area to remove any solvent residue. Follow that by blotting with a cloth dampened with just water, and finally, blot it dry with a third, completely dry cloth. Let it air dry completely, and once it is, you can gently brush the pile with a soft-bristled brush to help it stand back up. Your sofa should be back to its glamorous self, with no memory of its colorful trauma.
