I'm sorry Harty. The first time I like to follow directions directly. You said to render at 2800 pixels but didn't mention the DPI. For my comics I normally use 300 DPI as 600 just takes too much time to render with my slow machine. I suppose it might not matter in preview mode.

You can get the Topaz Clean plugin for Photoshop for $30 dollars american. There is a trial period but I don't see any restrictions on it as they said there would be.