ABS is a lot more resilient than you think. I have a "Type-R" lip from jdmshit.com and I've scraped the hell out of it and it still holds it's shape. Granted the paint is practically non-existant on it, but it's not like it's cracked and falling off of my front bumper.

The only thing I'd be concerned about is that you install it well (double sided tape and screws) and that if fits snugly onto the lower part of your bumper.