I have a couple of old penn reels in my garage that haven't been used for years (like 30 years) I cleaned and oiled the reels and want to put new eyes on the rods so I can give them to my son. I replaced the eyes with new ones and spent my Sunday morning neatly wraping them with thread. I would like to know what to coat the thread with? Glue? Varnish? Some other substance?