Man I wish I had the skills to build that pedal! Nice job throughout. Sounds like you may not be all that happy with that etch, but I think it has a GREAT road-worn look, like a beloved pedal that's been on someone's pedalboard for a long time. Be proud of that build inside and out!
The etch was a little rough on the edge because I wasn't steady enough with the fingernail polish and thought I could use it to repair some mask that didn't transfer from the paper when ironing.
Whenever you get areas where the mask didn't transfer, you can still often save it:
First just make sure to get nail varnish on those places where the mask didn't transfer, but you don't want etched.
When you do that, no matter how careful you are, you almost always have areas that are "overpainted."(Accidentally painted where you didn't want paint to be.) Just let it dry thoroughly.
Then get an exacto blade (with a brand new blade) and a magnifier. Slowly cut through the nail varnish where the edge of the mask
should have been. Then lightly scratch the enclosure with just the very tip of the exacto blade where the paint shouldn't be, and you'll be amazed how cleanly the excess paint will come off and how much you can repair a less than perfect resist. I've repaired several masks that way, and they ended up so that you couldn't tell they were ever repaired at all...