Does Anyone Use Lighthouse Vibration Cleaner?

As a numismatist, that linked webpage (including the "We also recommend" stuff) is one of the scariest things I've ever seen. I am flabbergasted that a reputable coin-related supply house would speak of such destructive measures as "acceptable," and based on that I'm done recommending Lighthouse to anyone, ever again.

"Coin polishing cloth?" Really?

As explained many times on this and other coin forums, yes you can remove some of the dirt. HOWEVER, always noting that removing something that is not just dirt may be now part of the coin. By that I mean substances, like Oxygen, may have combined with the metal of the coin and removing it, removes part of the coin. Sometimees leaving pot marks.
Anybody that says to use soap, water, vibration systems, toothpicks, etc. is sort of a joke and doesn't know it. The worst part of someone saying to use water or soap is no where on Earth is Soap and Water the same. And your tap water could be the worst for coins.
Your best method is to first of all try Distilled Water. Soaking a coin in that would only remove plain, ordinary, soluable dirt and not the metal of the coin. To take one step further, purchase something called Acetone. Dip the coins in that for a few minutes then make sure it is dry after words. HOWEVER, again, please check out the tab for Search for Acetone. Highly flamable STUFF. Precaustions should be the primary concern.

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?