I have tried it occasionally, but can't say the results have ever been rewarding.
Silver dip will get rid of the marks, but also all the lustre, leaving the coin flat and lifeless.
Using a cotton bud dipped in silver dip or Ammonia or lemon juice allows a more selective cleaning of just the spots, but getting to a result that doesn't still look blotchy takes a lot of effort and is rarely successful.
I have not tried the aluminium foil and bicarb of soda technique on a modern coin - maybe someone else has?
If you have examples that are not too scarce or valuable, experiment and let us know your results. After all, the coin will still be worth its melt value, and that is all most buyers would give you anyway for the common coins.