Will this stick/apply to plexiglass as well as regular glass?

Yes, most of our static as well as adhesive films (like this one) will work fine on acrylic. It may be more difficult to remove since you can't scrape the surface like you can glass. Also, add a bit more soap to the water so that it does not grab the acrylic surface too quickly. Note that this film will not be warrantied if installed on surfaces other than glass.