+xTo get a reasonably good smooth (and glossy) finish on repairs like this, you want to stretch over the surface some of our
Unperforated Release Film The film is smooth by nature and if you are careful and it isn't too curvy, you should be able to smooth it out and get a crease free finish.
Once cured, depending on desired finish, you can leave it as is, or do a bit more sanding and polishing to blend the repair surface in.
Thanks Warren, just checked the link. Will go with that.