I made a dress for my daughter to wear in a wedding 16 years ago, and now we would like to use it again, but it has yellowed. I can't remember if the fabric is washable or not - I have had it dry-cleaned. Are there specialty dry cleaners? Or can I do something myself?
Try gently washing it with Oxi Clean or the generic, in a large basin or very clean bath tub. Depending on whether you used beads or sequins, be very careful not to wring or agitate it. I have had great results with these products on my grandfathers christening and baby clothes.