The process I went through to trim a round window using "normal" vinyl J channel. It was bent using some wooden form blocks and a heat gun. I made the video because I can't seem to find much about how to do this and thought I would share what worked for me. To be clear, I am not an expert with vinyl siding or trim and this may not be the best way to do it - it's just what worked for me.
If you have a better way please describe it or even make your own video...
Oh, and, yes; I do know about flexible trim. I just don't like the way it looks and was trying to make something better.
