Prom dress

Hello, everybody, if anybody knows anything about getting these few stains off of the satin prom dress that my granddaughter got on it. That would be great. She did wear it 2 weeks ago. And originally costs $229 and it is a size small, the low low price today a $55. If anybody's interested, please note. There are some stings on it, but. It's all at all pretty cute. Anybody interested or anybody? Got any good ideas to tell me how to get the stains out. Thanks for looking.