I have different grading question. I'm a member of NGC. I have a beautiful 2009 UHF which I purchased from mint. When preparing to send it in, I noticed a blood red copper spot on the lower reverse. Contacted NGC to see if the spot would affect grade. They recommended I send coin to NCS for conservation, meaning removing the red spot. In my opinion conservation is coin altering. I'm in a quandry. The red spot is the opening step of toning. If the present color has anything to do with it, it will be beautiful. I feel like holding the coin, raw, even though I won't live long enough for this natural process to take place. There may be a time, with the economy in its present state, that I will be forced to sell. What are your opinions of conservation? What are your opinions of selling/purchasing raw gold collectibles with visable copper spot. The spot is hidden at coin bottom, reverse and does not affect field or raised portions.