I'm in the middle of a huge remodel of my main bathroom. Meanwhile the
master bath is also in need of a remodel but that's going to have to
wait for two reasons. First, these are the only two full bathrooms in
the house so as long as the main bath is out of commission, we need
this one for showers and such. Second, I don't want to spend a fortune
doing both at the same time.

Anyway, the shower in the master bath is trying as hard as it can to
force my hand. From the day we bought the house, the original tile has
had major mildew problems (standard 48x36 shower) that I've been
fighting all along.

I'm now thinking that a quick, temporary solution might be to take
down the metal shower doors (standard two-door glass/metal slider) and
literally glue 3 pieces of thin vinyl sheets that I've seen at Home
Depot (rather nicely in the style and color of my existing shower)
right to the existing tile. Then I could put the metal door frame and
doors back up and I'd be set for a decent period with very little
concern for mildew buildup, etc. Plus any existing mildew would die
and dry up behind the tile so that when it does come time to tear it
all down, things should be rather dry and problem free.

Would this work? Is there a better solution that meets the needs? The
mildew is at a point where much of it has saturated into the grout in
spots and doesn't come clean. Bleach helps but even that is providing
limited results now.