We have a gorgeous (to us, at least) Pastel Banana BP who currently weighs in at 170 grams. His spots/freckles/beauty marks are just starting to show. As others have said, what is an aging banana without spots?
It is my understanding that certain morphs when combined with Banana will suppress the spots. I believe that Mojave and Lesser Morphs will accomplish that but I would rely on people with actual knowledge of BP morphs (definitely not me) to weigh in before spending your money.