I was wondering about resin, too. Does the pine have a strong pine smell to it?
Just as a guess, if it is the plane itself, my guess is that what matters is the lever cap, chip breaker, and back of the blade and wonder if there is a coating on them. Is this a new plane? Any chance there is a coat of lacquer? I would try cleaning with lacquer thinner (good ventilation, double glove, & respirator). If that doesn’t help, I’d try cleaning with denatured alcohol. I would also guess that no amount of grounding and other electrical monkey business will matter/help.
What fluid, if any, are you using when sharpening?