Flowable Dental composite over mercury filling?

[mydent]

Hi guys I was wondering if it would be ok to take some flowable dental composite and paint it over my mercury type amalgam?

I'd be doing this for safety reasons only. They say these filling leak some mercury, theory is that you would have way less leakage if you had a thin coat of composite over it. Seems to me this is pretty easy to do and a great idea as well.

Thoughts?