I have made my own PCB for a project which carry AC supply, and I want to know all about it: If due to moisture it may short out or not, and how to protect it from moisture.
I have seen UV curable solder mask, but I didn't find it in any store, and I have got to some shops, they have something spray or transparent liquid which provides protection against moisture but it was costly. I can't buy it for just 3-4 PCBs.
Please suggest me any other cheap way to provide a protective layer. For a moment I thought to apply oil paint or hot glue on it, but I didn't know if it will work.