Is there a special way to store display cakes so they don't fade, turn yellow or get spotted. I have seen displays that look yellowed and spotted, as if they came in contact with moisture. I want to make sure my displays continue to look clean and fresh. Any advise???
The only way I can think of is glass display cases.
Keep them out of direct sunlight to help with the fading. I'd also wouldn't do purple, which is known to fade in most icings in sunlight and florescent light. Pink as a tendancy to whiten out some in the same conditions.
Royal tends to yellow after time so I'd say avoid using it white if you don't want to worry about that.