How do I blur colour borders in Paint.NET

Question

I have a document from which I am trying to remove marks. I'm doing so the only way I can, with the colour-picker and the paintbrush, painting over the marks with the closest colour around them. This is all white paper btw, but has wrinkles and smudges etc. When I paint over, I get a streak of nice uniform colour.

I'd like to select that colour and some surrounding colour and somehow blend or merge them. Can I, and if so, how can I?

Answer 1

You should use the "Clone stamp" tool for this, (Shortcut key: L).

In order to use the clone stamp, you must first choose an area to copy from by clicking an area of the image while pressing the Ctrl key. You may choose a new source area at any time by doing this again.

If you want something more precise, install Gimp and use the Healing tool.