Hi all,
Does anyone have experience or advice on insulating an arduino nano? I am putting the nano into a metal cup, along with some other components, and my main issue is not shorting any connections. I have already put paper tape everywhere, but it is not really reliable as the sometimes sharp points of connections can poke through the tape (for instance, the header pins that are sticking out of the top of the nano) - I lost one nano to this already. Maybe there is some kind of resin available to insulate these pins? Or another solution? Thanks!
I have potted projects with silicone caulk or 2 part epoxy. The epoxy makes it impossible to de-pot it but caulk will peel off if you're careful.
Make a little box and fill it halfway with caulk and then press your component into it and cover the top with more caulk. It can take a couple of days to dry though...
I've never done it with IC projects so you may want to make sure the material you use isn't conductive or start by wrapping the board with electrical tape or something before potting.
Can you use nylon screws and/or nylon standoffs?
I'll suggest something simple I used to do to mount homemade boards, but I can't really "recommend" it... 
I cut some small pieces of high-density foam weatherstripping (something like [u]this[/u]) with some superglue on both sides to mount the board in place. With a typical-size board, I'd stick a little square of foam at each corner. With the nano, I'd probably use one big piece with some small dots of glue. Hot glue would probably work just as well.
Or, maybe you can stick the foam in the cup in a way that can holds the board in place, and provides insulation, withoutactually gluing to the board.