I removed the old film using the trash bag method it actually worked fantastic and removed the film entirely but left about 10% of the adhesive behind (not in the area that the marks are, on the edges). The remaining small bit of adhesive I did remove with windex and a stainless steel razor blade.
these marks are on the inside of the window and definitely not adhesive. Almost seem like permanent damage / etching in the glass? I definitely don’t want to mess up my windows more with a buffing agent- scary!!