Looks like a topic worthy of a proper write-up and a pin. I have a fair number of screens from various machines across the eras that would benefit from a new polarizer but I'm not sure where to start in most cases because there's such a variety of sizes and quality (STN, TFT, mono, color). I think I threw out a few of the newer panels from iBooks and PBG3s because in addition to being nasty they also smelled horrible and contaminated everything they were near, including corroding some of the PB's internal components, so I didn't feel they were worth the effort.