Porsche used water based paints on these cars. To add to what the others said, I would recommend that you give it plenty of time to clear up on it's own. I bought a car that had been sitting with a bra covering the front, that held moisture on it for months. I could peel the paint with my fingernail. After leaving it open to the air for a couple weeks, it was almost completely back to normal.
Here's a little trivia and history about the paint:
A Little Porsche Paint History - 6SpeedOnline - Porsche Forum and Luxury Car Resource