I think you would have to dunk the whole bag to keep from getting a water mark. You could try ironing the flap under a presscloth.I just received my mahogany? Patricia. She is in great shape and so soft, my first bag from Mexico. But I want to get out the crease on the flap- so I need to dunk the whole bag, or would it be possible to just dunk the flap, or would it be unevenly colored then. Would steaming be the best option? Any help is so appreciated!