I'm a bit of a G&W newb and just bought a Mario's Cement Factory (CM-72) and a Popeye (PG-74).
But Popeye's front film is warped and the inner film is not gray but yellow. Faded by direct sunlight, I'm guessing. Could I replace both polarizing films with this? ... but custom cut to their proper sizes, of course.
www.ebay.ca/itm/Polarizing-Film-STANDARD...SwPhdU1~KH:rk:3:pf:0
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