Huge difference between cleaning and conserving.

To me 'cleaning' is when someone tries to make a coin look better by indiscriminate dipping, brushing, etc. with the sole purpose of changing the surface of the coin at the expense of its luster. 'Conserving', on the other hand, is a professional removing debris without damaging the surface of the coin. Conservation should not improve the grade of the coin but, may in fact, change the appearance and therefore, the value of the coin.

Latest aquisition, an $1,800 coin for around half-price due to some spots on its surface. The luster is still there! A candidate for conservation?

On another note, I resubmitted (my first) an MS63 and it came back an MS64. The coins value doubled overnight, well actually the process took 10 days.

Best of luck,

Dan