I am relatively new to serious collecting and am having trouble figuring out what makes this appear that it has been dipped. Of all the graded SLQ's I have seen in the xf45/au50 range that are marked "improperly cleaned" they all seem to have a very noticeable dull gray/silver color. This coin has a lustrous shine with slight yellow toning. I thought that the solutions people use to clean these strip away toning and luster. I compared it to some of the current SLQ's on Heritage that are graded in this range that were "improperly cleaned" and this doesn't look like any of them. Am I missing something?