I got a grout sponge for my ONR, because people seem to like them on here. I pre-spray ONR on the panel before wiping w/ ONR and sponge. The GS seemed harsh sounding (scratchy) as I used it. My car is silver, so I don't see anything wrong, but the sound and feel was different that anything else I've used. I thought I'd ask if others had the same experience and if that's ok.