[th0ma5]

Maybe they just put on a thin layer of conformal coating?

[sgt]

What about clear coat paint you would get from a hardware store just before launch?

[0_____0]

fwiw You can get urethane and silicone conformal coating in a spray can and it's not that expensive.

[sgt]

Agreed, and your wife won't be upset when she discovers all the nailpolish is gone :)

[djaque]

I've always used clear nailpolish as a hacky version of conformal coating.