To set up this glamorous tablescape, prepare four medium white pumpkins. Using a small craft brush, apply gold leaf sizing adhesive along the raised ridges and top stems of the pumpkins, pressing sheets of genuine or imitation gold leaf foil onto the tacky glue and buffing away excess foil with a soft dry cloth to create an organic, cracked gilded texture. Hollow out two of the gilded pumpkins, inserting soaked floral foam lined with plastic cups. Arrange full white hydrangeas, ivory roses, and cascading white phalaenopsis orchids inside the pumpkins, tucking metallic gold-painted seeded eucalyptus and dried palm spears around the base of the blooms. Place the floral pumpkin vessels on a shimmery champagne satin or metallic-threaded linen runner. Surround the vases with the remaining uncarved gilded pumpkins and polished brass candleholders fitted with slender ivory taper candles. Add gold-rimmed porcelain dinnerware and metallic gold flatware to complete each formal place setting.