Depending where the cracks are, I would thnk you could pull the affected panels out, repair them from the rear, and reinstall. Andy from Inland RV said awhile back somehting about mixing plastic with a small amount of a solvent to create a paste and repairing with that. maybe he will elaborate.
My cracks are in the panels under the cabinets,I have considered covering that area with a vinyl applique, I have seen some that look mighty close to the colors.
Another thought is to repair with a bondo type stuff, and then sponge paint to match the surounding surface.
It all depends on the budget ( mine is very restricted...I teach school)!!!
