It depends on what you are trying to clean out of the Porcerax II. For EDM oil or water, you can put the Porcerax II in an oven at least 250 degrees F and that will evaporate the water and make the oil more viscous. This will eventually cause the oil to leak out of the material.
For resins, it depends on type of resin and how contaminated the pores are. I advise you check with your resin supplier for the recommendation on the best solvent to use to break down the resin.