Help with Removing Dust Spots from Still Footage?

Hello all, I am trying to remove some dust spots from a short-ish section of video. It is a still shot taken on a tripod. I have figured out how to cover them up using the clone paint brush in Fusion, but I can't figure out how to apply the edit to all frames of this particular clip?

Any help is greatly appreciated!! None of the YouTube tutorials I've looked up are working for me or are relevant to what I'm trying to do. Thank you.

The default brush is the multistroke brush which is designed for frame by frame painting and all brush strokes will only be visible for a frame (until otherwise specified). I believe there is a function to turn multistrokes into normal ones or maybe that's a script I'm not sure right now.

But the easiest is to choose the normal strokes brush instead.