Question About A Recent Greek Purchase

I sprayed a 1964 Kennedy half in 1964, with clear acrylic lacquer. It is in exactly the same condition now as on the day that I sprayed it.
Acrylic lacquer is easily purchased in spray cans. It is the recommended treatment for the anodised alloy trim on my 30 year old classic Mercedes.

I just have not got enough nerve to treat an ancient coin in this way.

Perhaps I am right, perhaps I am not.
Perhaps what what I REALLY should do, is ask a curator in the Coins and Medals Department of the British Museum.

Maybe a 'Net search could help answer this question.
At least, (I think), that the lacquer could be removed with acetone.

So far as this coin is concerned, I think that the particular mode of patination is a product of the environment it has been in. Maybe a different environment would have produced a different patination color. If you think that there is some kind of plastic on it, an acetone soaking MAY help to ameliorate the brown color. I don't think that harm would be done to it.

However, if it WAS changed, you may not be able to return it. Sometimes, in life, risks have to be taken. The choice is yours, but ask for more opinions first.

Why rush? Time and exposure to pollutants in the air will tone the coin in time just like it does the pennies in your pocket change. Don't seal the coin away in plastic but sit it in a bright south facing window where it can keep warm and see if it looks better this time next year. It is an ancient coin. It is in no hurry.

It already looks better than it did with the paint.

It looks like a horrible attempt to put another patina on it. I hope I dont offend anybody by posting some of the pics lately. maybe I should only post finished coins instead of the process I have put some of my coins through. I think I should just put more money down on better coins. Sellers should always note this when they sell.