Just a thought here...
I use butter or any vegetable or animal oil to clean pitch from my hands. First the butter then detergent to clean the butter. Of course thats on fresh pitch it may not work on the more dried variety.
Perhaps the citrus oils would be the best suggestion
For really bad and predictable pitch pockets I have had success with epoxy "plugs" but you have to clean the pocket back to clean wood. (and then clean tools with the afore mentioned butter)
Please let us know what worked for you
J.E.B.
