Can I put a couple of coats of varnish on Laminate Flooring?

Varnish will not stick to a laminate floor. I have been finishing wood cabinets and furniture for 24+ years , and I know a little bit about finishes. Your first line of defense is to state in the lease agreement that, " Dry dust mopping or "Swiffering" only on laminate floors areas". Also state the reasons for this stipulation. I have installed several laminate floors . They "snap" together with a tongue and groove style joint and are not meant to be glued. You can however use glue in the joints. I would recommend Titebond lll wood glue. It has a long open working time and its waterproof. When you install the flooring put glue on the top edge of the "tongue" and put the pieces together, letting small amount of glue squeeze out. Have a damp, not dripping wet, rag handy and wipe away the excess glue. If a small even bead of glue squeezes out along the entire length of the seam , that is desirable. That way you know that there is adhesive along the entire "raw" edge of the flooring. Laminate floors "float" on existing floors so,if you ever need to remove it (although they last a long time) it shouldnt be too much trouble.