[header] How to restore hazey headlights with a new protected surface [title] Remove corrosion. [title] Spray plastic cleaner on the lenses, including the edges. Wait 10 seconds and rinse lenses and surrounding surfaces with water and dry. 
[step] The lens cleaner selected should be compatible with the lens sealer used. Four grits of sandpaper may be used : 320 , 600 , 1000 and 1500.