I use CA glue (superglue) and haven't had any smell or taste residue with it.
The saltwater fishing pole websites and woodburning websites have some info on blocking UV rays to prevent fading. Nothing worked great.
Some of the Museums use Renaissance wax to slow down UV fading.
multiple coats of ca glue did help compared to just a couple coats, I use Ren wax and keep them out of direct sun when you can