I endorse the idea of the Ironing feature.
I have read about the trick with additional process on top, but we need to polish top layers on different heights (areas), so using additional-process-trick would be quite consuming for setting up.
Developing this idea I think about ironing the first layer. Yes, first. Too often the bottom of the model using as a front face - in panels. I will try.
Question: I'm not completely understand - for the Ironing I need to decrease the speed or increase ?