It sounds like the salt aggrivated your irritated lips.
The resin-acquired allergy is fairly common, if you are repeatedly exposed to it. More common with polyester resin than epoxy resin. My uncle acquired the allergy after redoing his fiberglass boat. Every stitch of clothing/fabric in the house had to be natural/cotton after he acquired the allergy.
I developed an allergy to the cutting oil that was commonly used in machines shops about 10 years ago. It was recycled so much (clean out the scraps of metal and reuse), we had a team from the University of Connecticut come to the shop to figure out what was going on. The company, before dying, had to switch over to an artificial cutting oil to end the problem. We had guys go out for months on end with growths on their arms, feet,...and put on steroids for months after contracting whatever was in the natural cutting oil. The company considered the workman's comp normal overhead.