Just posted this in the screens forum, but I think this issue is of particular relevance to CRT owners so thought I'd post it here as well.
My Stewart ultramatte 150 microperf electriscreen has been rolled up (retracted in its casing) for the last ~18 months, unfortunately with 1" (approximately square in shape) Scotch blue painter's tape strips still attached at 9 points on the screen as geometry aids from when I last set it up with a Sony G70 PJ just b4 putting it away (forgetting in the process to remove the strips).
I recently took a look at the screen (no longer have a G70 - or any PJ right now - but am considering getting another one in the not too distant future), and removed the painter's tape strips/squares, only to discover pink marks on the screen left by the tape. I haven't tried any aggressive cleaning, but a warm damp cloth doesn't seem to have any impact. It almost seems as if the back of the tape has reacted with the screen material, turning it from white(ish) to light pink at 9 points (~ 1 sq. inch in size) on the screen. If that is the case, I can't see any amount of cleaning doing any good.
Has anyone experienced anything remotely similar? Any suggested remedies? I'd hate the screen to be a complete write-off (though I suppose I can still keep/salvage the electrics/motor/housing and replace the material), so any advice would be very welcome.