Does Anyone Use Lighthouse Vibration Cleaner?

BadThad, I like them anyway, but I would like to improve their appearence without causing damage to them.

Your best bet is to sell them and replace with coins that meet your appearance requirements. As I see it now with reference to calcium carbonate and the like, you're on the path to ruining what you have. Sorry, just my opinion.

VC is primarily designed for the conservation of lightly corroded coins. Yes, it will also remove dirt and residue, but I never really intended that use of the product yet many do use it for that. I still stand-by my statements, if they are just dirty, leave them alone or replace them. Conservation is not a task to be taken lightly since it can ultimately ruin your coins when done improperly or unnecessarily.

Nice, thanks for your explanation. And how about the freeze/thaw method? Is it good for all types of metals? No risk for coins involved?

Freeze, dry, thrqw, soak, dunk, wash and on and on. Regardless of what you attempt, if not sure what your doing, a good chance you'll make things worse. It is rather fun to experiment on what you consider a valuless coin, but even that someday may be required for someone's Album. It is always best to just leave a coin as is.
It's an odd world we live in. We do all sorts of things to our cars to make them shine as good as new or better. We wash and claen our cloths, our houses and polish our shoes. Yet cleaning coins is just wrong. Sanding down old furniture is wrong. Odd isn't it?

I think NGC has a cleaning service, you could try them.

I'm most bothered by the fact that this stuff is being sold without any numismatic caveat whatsoever regarding the incredibly subtle qualifications for using any of it. Had the OP not been wise enough to post his thoughts here, he might think that removing dirt from a coin made sense regardless of the conditions of the individual coin.

We all know that a dirty coin isn't good, but removing that dirt will lead to a coin which is only partially "clean" and therefore destroyed since the fact that it's been cleaned will be so transparently obvious as a result. Yes, in certain narrow circumstances stuff like this is recommended, but that might change between two near-identical coins of the same date and denomination.