Hi Brian, yeah the naked edges that Jonah shows are areas where your different surfaces don't touch closely enough to be joined. There are some spots where they have a bit too much of a gap between them, and other spots where they are pushed a bit too far in the other direction and overlapping each other too much.

For example, here is one such area:



Usually the best way to solve this is to get the curve framework all tightly positioned first, before creating surfaces from them.

Do you still have the curves that you used to construct this object? If you have those, please post them, editing those would be probably the easiest way to tune it up.

- Michael