I know that I have put Armor All on the floor, it looked great but was so slick that I washed it with simple green and rinsed it down very good but putting the trailer nose high and using a hose and left it alone. I have not noticed any fading doing this. I try to keep oil off of the floor from any leaking or toy maintanance by using pizza boxes with kitty litter under them.
In my opinion a floor with a little traction is better in the garage than a shiny surface floor.