This type of toning is just plain ugly! In fact, I call it environmental damage. I believe it decreases the value and most collectors would not want such a coin in their collection at all. Beautiful toning on Franklin halves is a rare find, but ugly mint set toning seems to be the norm for high grade coins. I prefer brilliant in my set.
Is it damaged? Or is it just toning? If it's just toning, I think dip will make it details. If it is already damaged/details hard to hurt it any worse as it will always retain silver melt value.
I suggest you leave the coin alone before you really ruin it. Scrubbing with the Q-tip may have left hairlines from improper cleaning.
After the thorough flushing of water, I would do the same thing with acetone. After dipping, the surface of the coin is at its most fragile chemical reacting stage and water is the chemical that can cause the process to start over ( depending on your environment). Acetone will remove all water on the surface of the coin and evaporate off to leave a dry coin to preserve in a flip. No rubbing to produce hairlines. Jim