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Polishing Clear Castings
To restore a clear finish to the surface of a casting made from one of the Crystal Clear products the surface must be gradually sanded with increasingly finer grit grades of sandpaper. Then finishing with a sanding gel.
Begin by sanding with a medium grit sandpaper (120 grit) until any prominent protrusions or grooves are removed.
Next use 220 grit sandpaper.
Use of a wet sandpaper (sandpaper made to be used with water). It is recommended using above 220 grit.
After that, sand again with water and 400 grit sandpaper. Then move up to a 800 grit with water. After that there should not be any visible scratches on the surface, and it should appear translucent.
To Finish, polish with a sanding pad attached to a power drill (no faster than 1500rpm) using Nic San 10,000 grit Sanding Gel until the casting is perfectly clear.