I colorized this image..
rule34.xxx/index.php?page=post&s=view&id=2435534

And it got flamed by people who were fetish shaming. Now I see that the image was removed. What can I do to recover or prevent future images from being wrongfully removed?

it might have fallen under the 'no unofficial edits' rule

not really sure

That was always small artists only, but that has changed.

Now it's just it might get copyright taken down by the original artist warning and it has to be of good quality.

You have to ask admin by mail to query an image, the forum is not for that.