Yes the sponge can be used on just about any surface I use it on Paint, Chrome, Glass, Mirrors, Plastic front bumpers and I have never seen any marring from the sponge. They do break down over time though (I got about a year of normal washes) which is awsome for the price I'm just waiting for them to go back on BOGO and im picking up a few of them and storing away. It makes cleaning rockers and bumpers even hoods so much easier.. The wife even dosnt mind using it its so easy. She saids hang me the bug scrubber thingy and she goes to town... Hey its one less thing I have to do!!!!