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[ATM] lens polishing

I am using 10 mm diameter biconvex lens for spreading
laser pointer beam in Bath interferometer. I found that
part of "sponginess" of interferograms comes from this lens.
It has many surface defects which are either pointlike or
small scratches. I can not remove them with  water,
detergents or solvents.
Can I polish the lens lightly with cerium oxide so that
surface will become better. 
If yes, I will appreciate advice on polishing technique for  this small lens.

Regards
Vladimir.
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