Fishunter- Are you sure that is epoxy you are dipping your bait into, sounds more like a thinners based clear – if dipping in epoxy you must have a lot and be mixing it 'too hot' to do all that damage.
There will be an avalanche of advice here, but we all will need to know primer type, paint type 'clear epoxy'?? type etc.
To me from what you have described, you have dipped in some sort of thinners based clear lacquer and because of it's high thinners content (slow drying time) it is attacking every paint/ primer underneath it- if so, its better to get all your paints and primers completely dry, then spray a few light coats of clear to seal everything before any dipping and for your first dip make it quick.
There is a massive amount of info on 'dipping/stripping' and how to fix it in the library, do some searching.Pete