if your a fireman what do you do while their are no fires?
Composites do not need resin finishing. I've never heard of such a thing. Composites are polished after they have been placed and that's the end of it. The life of a composite filling is not dependent upon top coats but rather the size of the filling and the chewing stresses placed upon it. And of course, how well it was placed. Sorry, he sounds like a charlatan and I would not go back for his proposed treatment. Dentists like this give us a bad name.
Yes, make sure you stand in water. If there is an electrical discharge or short circuit of the machinery the water will dissipate the electricity and keep you from being fried. If you're still reading, then I hope you know I was kidding. This sounds like you're gonna end up killing yourself with a homemade bomb. Do you know how I know this won't end will for you? You wrote this: . Scientists don't go . Therefore, you are not a scientist or even a mature and responsible individual. If you are not a scientist or a mature and responsible individual, and we have just proven that you are neither, then you should not attempt what you are doing. You sound like a knowledgeable person. Because I believe that you may have at least ordinary reasoning skills I will assume that you will make a reasonable choice and look at this project theoretically without testing it physically. Of course, to assume is to make an *** of you and me. That being said, it is my greatest hope that you will not attempt this, as one of the other answers of this post also specifies the extreme danger of this project. Just say no.