If you're not sure what to do, take some photos to the paint dept. of your home improvement store and ask for their advice on paints and application tools for a professional finish. They have products you may have never considered.
I appreciate all of the help I get from Hometalk but still like to get advice from the pros who sell the stuff we need to use to get it done!
What kind of floor tiles? If wood there will be some sanding involved.