On Apr 13, 3:08 pm, G wrote:
I guess the previous owner had an old bathtub/tiles sprayed with some
kind of white enamel paint or something because some of the edges of the
tiles that are hit by water constantly are starting to peel/crack off
exposing the original ugly tile underneath.

I bought "porc-a-fix" at home depot and was going to give that a try to
prevent water from getting into the tiles and peeling it inside out, but
is there a more common way to touch-up the tiles treated with such an
overcoat? Are there spray-on glossy white enamel paints I should use
instead?

Any tips/suggestions much appreciated!

Paint over tiles? If the paint is peeling then you can address that.
Scrub with wire brush and scraper until you get the peeling cracking
paint removed. Yu don't wan't to remove all the paint unless it has
all failed. One your surface is clean and smooth then you can
repaint. I use and oil based enamel on difficult surfaces especially
if exposed to water.

If the tile is failing then that's a different problem and likely
requires a tear-off.