This abrasive compound, which is used to polish optical lenses, can remove oil film and old dirt coating without damaging the glass surface. It doesn't leave oil film or dirt after wiping, so we recommend using this before applying any sort of glass coating.
Directions to use
1. Remove a sheet from the package.
2. Fold the sheet as necessary, and wipe the glass until the surface stops repelling the liquid.
3. If sheet gets dry, re-fold it and continue to use a clean side.