When polishing platinum, it is important to remove all scratches before the polishing process.
When filing, file gently with a diagonal movement. Then repeat with a diagonal movement perpendicular to the first one.
Remove file marks with abrasive paper such as 400, 600, and finer paper.
Be sure to use the files and abrasive paper only on platinum to avoid contamination.
Reduce the surface to at least a 600 grid finish on the bench.
Burnish the ring with a polished Tungsten burnisher.
Use platinum polishing compound only for luster.
Use 2000, 4000, and 8000 grid polishing compounds.
When polishing platinum that is joined to gold, be sure the platinum is polished completely before polishing the gold.
Check with tool suppliers for brand recommendations.

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