With all this talk of applying epoxy on PC boards, it might be worth mentioning that not all epoxies are non-conductive. The vast majority of them are non-conductive, but there are some that are conductive. Putting anything on o PC board that is even slightly conductive will be sure to alter the circuit somewhat.
Most epoxy manufactures will have conductivity information available on their websites.
Food for thought.
I am pretty sure at $40 a tube you would know if you were using conductive epoxy
Suggest using 'clear' epoxy as conductive types are NOT clear with having conducting metal particles in the mix.
Plastic 'welder' type epoxies are not clear, rather with a 'creamy' semi-translucent look, and better adhesion to many hard to grip plastic surfaces like inside the deck, and as far as I know, also have no conducting metal particles. I have used this type inside the deck in the past and no problems so far. These types are generally 'higher viscosity' types, and are a bit harder to force into small features like corners.
Some heat conducting epoxies do have metal oxides and maybe some other stuff, and also should not conduct, but maybe stay away from these in general just to be sure.