The thing with any product is if you don't know how to use it correctly you can damage the paint. I have used Griot's Ultimate Paint Squeegee for three years now. I use it on $20,000 cars to $120,000 cars. I have NEVER left a scratch on any car.
I also have the California squeegee and it sits in my shower to clean the shower doors. I would not let that product touch any car I clean. Day and night difference in the two products. Griot's is made from a closed cell foam.
Again if you don't know how to use a product, learn.
Ping Golf Club demo tech