Have you tried setting the droplet up as an external editor?
How did the post processing method not work properly?
Or just export to another folder, then make the original folder go missing?
No I wasn't aware I could set up the droplet as an external editor- thanks for the suggestion, let me research that.
It didn't work as it would not overwrite the original file. I assume it's because Lightroom was trying to protect the original not realizing the action was not destructive...
Exporting to another folder is not an option as I'm editing hundreds of files that are in several hundred different folders... I want to maintain the original folder structure. I'm just trying to remove watermarks layers...
Using a PS droplet as an external editor works fine in 8.0 for editing one photo a time. But when I try to do a large batch of photos, PS appears to get confused, sometimes showing an error and sometimes just failing to save the edited file.
So for batch changes with droplets, I use Export with the droplet as a post-processing action. The export saves as a new file in the same folder as the original, stacked below the original. When it's done, do Photo > Stacking > Collapse All Stacks, mark all the tops of the stacks as rejected, then delete the rejected photos, leaving the edited versions behind.