I have seen tuna cans placed into kerosene lanters to make a flat surface. Heres the link.
Upcycled Vintage Lantern Into a Farmhouse Candle Holder • Adirondack Girl @ Heart
Please consider posting a photo. If we can see what you have to work with we will then be able to offer realistic suggestions on how you might be able to improve it.
Cindy....Picture would be great !
So many ways! I would also look at Pinterest for ideas to help inspire you! You can do Halloween themes, Fall Harvest themes, leaves of fall colors, fairy lights, tuling, etc. You can also search in the upper right hand corner for inspiration, too!
You might draw some inspiration from some of our other Hometalk member's projects. They are not all the same type of lantern but the ideas still might work. Wishing you the best.