We are on a stage and the set is a high school hallway. The hallways are the typical looking school or office halls, however while it looks like tile, its just acrylic paint on the MDF floor. Every shoe that walks on this surface squeaks and squishes, sounds like a bunch of wet sponges. Rubber soles (tennis shoes) are worse. We have tried the usual suspects...foot foam, tape, booties, etc. etc. but have had no luck.
Perhaps a flat poly coat over that acrylic .... sounds like (no pun) the paint is the problem.
mike