CDDZ, You hit a chrome finish with sand paper and you get ruined chrome. Windex should keep the chrome nice and shiny...A little polish wouldn't hurt either..but no sand paper...period...Raw aluminum or Stainless only...
That paper is 3M wet or dry.. Works much better if the paper is pre-soaked in water for 15 minutes prior to use. A drop of regular dish liquid should be added to the water. Sand paper takes off too much material{aluminum} for regular cleaning...Just look at the paper in the video...all that dust was once a SB.. I'd stick with 3M...but would switch to Scotch Brite Pads. Grit is defined by color and in order the roughest to the finest grit: Burgandy, Gray, Gold. They also make green and white but basically those
three colors are what we use. Any good auto parts should stock the pads and will sell you a single pad. Scotch Brite is used to get a brushed finish. It cleans better,faster and takes off less aluminum....