I would like to install vinyl tile flooring in the "unfinished" part of my basement over the cement floor. Our basement is dry, but we did have water come up once a few years ago through the drain during a heavy rain. The floor has been previously painted and the paint is off in some places. Do I need to prep the floor first and can I stick the tiles directly on the floor or should I use another type of adhesive? All of the references to installing vinyl tile don't seem to address this situation. Also, do you recommend a finish to the edge against the basement wall with anything? THANKS!!