I have hurricane panels over my windows. There tracks are mounted on the concrete walls with a threaded connection every six inches or so, the panels have circular holes at the bottom, the panel holes are lined up with the threaded connections then secured with wing nuts. When I had the house painted several years ago the painters put paint on these threads. So now the wing nuts won't go on smooth, some of them I need a plier to thread the wing nut on. I know I can probably clean the threads up with a metal wire brush...but I have like 20 windows so over 200 of these threads at the bottom, and another 200+ on top. I am looking for some quicker more efficient way to do this. I am thinking, if I can put together something with a matching female thread, that I can fit into my cordless drill or impact driver, I can just drive that onto the male threads and strip the paint off, then back out and move to the next, and should only take a few seconds to clean each thread. Thoughts? A bit holder, with a hex bolt into the bit holder, then the hex bolt into a long coupling nut? Glue together?

I need to make a tri-fold display board for my wife. I plan to use some 1x4 boards and some lauan. I hope to be able to fold both side panels behind the front panel. However, to do that, I'd need to have one of the sides fold behind the other side as well. That would require a hinge with a gap in the middle. I've forgotten what those hinges are called, though. Could someone point me in the right direction? Thank you.