I'm not sure what you could do to the material itself, but I know that Joanes & Michaels sell those keepsake cases, similar to what military families keep their flags in, but you could get one that is square. Fold the dress so that most of the top front is showing through the glass top of the case, set it on an accent table with a framed photo of your grandmother wearing the dress. I think they even sell end tables with the glass case built into the top. I would keep some cedar in the case just to be safe. Very beautiful!