Well, I spent about an hour in the shallow end of my pool with a toilet plunger. Not the best opening line in a message, but after carefully working the wrinkles slowly back towards the pool walls I've successfully removed 8 pretty bad wrinkles. I'm about halfway done. It worked great. Just thought I'd give an update. I didn't have to drain any water. Thanks to the 2 forums I frequent for pool info. That's where I'd found the tip about the plunger.