Will conservation improve 20th century high grade uncirculated coins eye appeal?

If a coin has light whitish pvc and is high grade 20th century uncirculated material will the coins eye appeal improve after PCGS conservation? Do any of you have any experiences with conservation?
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Answers
It will. When I have time I will find my before and after photos and post them.
Thanks does that hold true even if I am only removing light pvc
PVC contamination is normally green in color. What you are describing sounds like milk spots which can't be conserved. Can you post a pic?
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I agree with @PerryHall... PVC is usually a light to darker green.... And milk spots cannot be removed. Cheers, RickO