Hi everybody-- Thanks for making this forum available. We just did a DIY (sort of) removal of about 80 sq. ft of VAT. I say sort of because we hired some guys to do most of the work. This morning they removed the underlying black mastic adhesive with something called Methyl Ethyl Ketone. I have read that there can be adhesion problems caused by the black mastic residue. We are going to have to skim the floor to level it out before putting the new tile in. What's going to stick to this puppy?