Several plants in my collection were burnt badly. A few mesembs and pinguicula. I expect the pinguicula to die, but I would still like to try to revive them. The pinguicula are 'aphrodite', esseriana, and cyclosecta. the mesembs are ihlenfeldtia vanzylli, pleiospilos nelii, and lithops aucaumpie. What is the proper treatment of a plant with serious sunburn?