Assuming you scuff up the etex before you paint, you might try an etching primer that will bite into the sealing epoxy and give a good surface to bond to for the paint. http://www.rustoleum.com/product-catalog/consumer-brands/auto/primers/self-etching-primer/
I've never trolled for or caught muskies, so I don't know how it will hold up to them, but it should hold up better than not using it.
Thanks to Cadman, I use it on lead heads, like spinnerbaits and jigs, before I paint them with Createx with an artist's brush, and then top coat with Sally Hansen's Hard as Nails clear.
The finish holds up to tulles, weeds, and the occasional rock collisions.