Colour Banding in Premiere Elements 15

I have just purchased Premiere Elements and potentially have made a big mistake. I have created my first video and have terrible colour banding in the sky. The video was recorded using DLOG in 4K. I cannot figure out a way to remove the banding. I have found in Premiere Pro that adding noise will accomplish this, but I cannot see the equivalent FX in Elements. Any help very very welcome.