I have a garage floor that needs repair. I'm looking to do a cement overlay. Leveling isn't necessary. Here are the major problems. The floor itself is constantly chipping/peeling. Do I need to do any prep work for that problem? Next there is paint on a major portion of the floor and a fair amount of it is not secure ...hence the peeling problem. Will the paint be a problem ?? Last but certainly not least ... what exactly am I looking for ? Are there some brands I should be looking for and are there any I should stay away from. My best source for this project willl more than likely be Home Depot. There are some independent stores also. HELP !!!!