We live in the Northeast and our garage floor takes a real beating in the winter from the salt and moisture. The floor is very pitted and needs some TLC. Problems are as follows. 1) floor is pitted so we'd like to grind the floor down about 1/4 inch. 2) The surface has been painted so in the ares that I can't grind down is there an easy way to remove the paint? 3) We are looking for some type of cement grinder to make the floor more level. HELP !!!!!