Use two credit cards under the plastic caps to squeeze together and remove.
Once screws are removed, use plyers or screwdriver and hammer or whatever to flatten the holes. Then dab a qtip of por15 on the holes.
Buy the new grey screws if you have an old one with the black ones, the grey ones are protected with a coating.
To reinstall the screws, use a screwdriver with socket, do not overtighten, only use two fingers or you will easily strip the screw right out. Use high temp low strength locktite with this method and they won't back out.