[Jimmer]

Hi there, I've used a couple different brands of self leveling compounds and found them to work very well. You want to follow the mix instructions closely and use clean, cool water. I normally use a trowel to assist in the spreading. An option for you is to lay down a screed rail (just a strip of wood) against the far wall and use a straight board to help spread and level. You would have one end of the board sliding across the screed rail and the other end on the floor that is the right height. Make sense? I would personally remove the old vinyl to allow for a better bond.