Green Gunk Removal Question

Not necessarily PVC, pictures would be helpful.

Buy high grade acetone from most hardware stores. I've even heard that Walmart carries a good grade. The ONLY ingredient on the label should be acetone. Acetone is safe for use on ALL coins, regardless of the metallic content.

You don't "dip" in acetone. Get a glass container with a tight fitting lid and soak the coin in there for a few minutes, 3-10 minutes is generally sufficient to remove PVC. Once it's gone, remove the coin from the soak, rinse with fresh acetone and let it dry (about a minute). If the green persists, you probably have verdigris.

Yes, Not the nail polish remover which is also called acetone
tried that type and left my silver coin washed white

Your pic links are bad.

As already noted try dipping in Acetone then rinse with distilled water. HOEVER, since Acetone is flamablee and there for dangerous, I suggest you do a Search on this forum for such topics as cleaning coins, coin cleaning, Acetone and/or other similar topics. In some there are detailed things for you to try and to remember.
Just for a brief summation:
You can buy Acetone from almost any place that sells paint. Walmart, Kmart, Target, Ace hardware, Home depot, etc.
Always test your Acetone for impurities by placing some in a claen glass dish and allowing it to evaportate. Should be nothing left.
Try to use glass utensils for handling your coins in the Acetone since this substance could disolve dirt from your fingers and add to the problem on the coins.
Should always be done in a well ventilated area, no smoking, no flames, not on a stove, etc.
Rinse with distilled water, place on towel, blow dry.

OR you could stop worrying about that old green stuff and just send all your coins to me.