Rock Guard, Bra or necked?

We have had a bra on our 2010 Chevy HHR for almost 5 years and it stays on most of the time. We towed the car for 12,000 miles and while the bra took a beating, the front of the car looked great and we will never tow without it. As for taking it off after a rain, we have never done that. I do keep a good coat of wax on the front end, and all of the rest of the car too, and never have seen any issue with the paint. I am sure the quality of the bra makes a big difference. We went for the best we could find rather than the cheapest. We did tow for a short distance without it and quickly reinstalled it. Chuck