I have a 2007 BLACK Honda CR-V. I washed it for the first time this morning. There was some bug residue that didn't come off during the washing on the front of the car and side mirrors. Is the Pinnacle Safe Scrub Sponge 100% safe to use on my black car without fear of scratching or marring the finish? Or should I try something else? I ended up spraying PB S&W on and wiping with a microfiber towel, but it required quite a bit of rubbing and reapplication to get the bug residue off.