Think you may have made it worse! There’s a boundary between “photo” sky and “Impression” sky ---- try a softer brush - brushing the hint of “photo” sky into the “Impression” sky.
added later …
OR make another layer image using a finer brush from same preset and soft brush that in
Sorry but now you have completely lost me… At first I thought you mentioned the church spires. Which I believe I corrected. But now I have no idea what area you are talking about…
Sorry ---- we are talking about the same thing - the spires.
The area from your paint in has a sharp edge around the spires - where the original artifacts existed. So there are two ways of overcoming this with layers
method 1 – put the original in a layer over the Impression layer and use a soft brush to lose the artifacts
method 2 – make another Impression of the image but use a smaller brush size in the settings or narrower or shorter. Then put this in a layer over the old Impression layer and use a soft brush to lose the artifacts