Protecting 120 VAC on my board

I have made my first board with high voltage on it, as seen in my photo. I added Bstop to the high voltage traces so I could tin them and make them carry more current. I'm wondering if there's some kind of household goop that I could coat the bottom of the board with to keep from being able to touch the high voltage contacts on the bottom?

Epoxy or "potting". Though it is pretty difficult to make changes to the circuit once it's cured.

I have lots of different paints, enamels, silicone caulk, plumber goop… Would any of these work to project the bottom of the board?

Whatever it is you use, just test it's conductivity with a multimeter... I use a hot glue gun personally.