Hi dodeqaa,

re:
> Thank you for the detailed reply! I'm stumped on the steps, I managed
> to separated the 2 piece sin question but selecting the edges of the green
> curved surface and pressing delete doesn't do anything?

You need to separate them out into individual surfaces, so for this case you need to run Separate twice. The first one will separate the 2 selected faces out from the main object but keep those 2 faces still connected to each other. Then run Separate another time to break apart those 2 surfaces into individual surfaces not connected to anything else.

- Michael