Vintage lace, lace that matches the bride's gown, or lace that was a part of a family heirloom add decoration and sentiment to a wedding cake. Use similar lace around the base of the cake stand or pedestal, and garnish the cake table or individual tables with lace swathes that match or coordinate. Dye lace in the wedding colours or leave white or natural for a softer accent.
Wash or treat lace to make sure any chemicals or dirt are removed before it contacts the cake. Use care with antique or vintage lace that may be more prone to dissolving in standard dish soap or washing powder.
Mix buttercream or royal icing the same shade as the lace to disguise any connecting points. You may want to mix the icing slightly thicker to act as a glue before affixing the lace.
Use a round or circle tip to pipe a line of frosting along the base of the cake tier on which you are placing the lace. Smooth the icing slightly with the spatula or a similar cake tool and press the lace gently into the frosting.
Slip the spatula between the lace and the base of the cake layer to tuck the lace in between layers or the cake and the base. Smooth out any wrinkles or folds in the lace, or use cake tools to bunch the lace in pleats or gathers.
Pipe another layer of frosting over the lace to create a border that disguises the seam between lace and cake. Accent this with frosting or fondant cutouts in the wedding colours.