Putting down a thin coat of latex leveler over the tiles should work fine. The only problem might be if the tiles are very dirty and the leveler won't stick to the tile. If that is the case I would get a good wax remover to remove any wax, dirt build up, then put down the leveler. Available at the orange store is a two part leveler, powder and milk looking liquid that has real good adhesion properties. I would recommend that. What ever you do don't sand or scrape the tile in anyway. I would also suggest that you wear a good mask when working with the tile. As long as you stay away from the "DUST" you will be fine. The "DUST" is what will kill you. I should know, I've worked with asbestos tiles for years, having sanded it to install new tiles over top of it. I've ingested dust in my system for many years without knowing the danger. My dad also ingested the dust, and unfortunately he died from it. He was a floor tile installer and I was his helper. Also, if you should encounter any dust on your clothes I would just throw them away. Perhaps you can purchase at the orange store a disposable nylon coverall. Not to put the fear of God in you but asbestos can be deadly if not handled properly. Good luck, use common sense, and you'll be fine. Any questions feel free to PM me. Stanley