"rb608" wrote in message
news:t_JWh.1015$YI1.114@trndny04...
"Wolfgang" wrote in message
By the way, I'm always surprised by how long an application lasts. I
typically get at least two months out of it.

Well then, let me ask this - when the application expires/wears
off/whatever, are you no worse off than you were before? That is, I
assume this is not a permanent commitment that you *must* renew?

I'm not prepared to state that it can't happen, but I've never seen so much
as a hint of the hazing that Tripper mentioned. My own experience has been
that you just notice after a while that the water no longer beads up and
blows off as well as it did. Given enough time, the effect disappears
entirely. Not surprisingly, the duration is affected by dust, washing, and
even how frequently the windshield wipers are used......but it's always long
enough to justify the half hour or so it takes to treat the windows, mirrors
and headlights (assuming they are glass.....I don't recall what the
directions say, but I never apply it to plastics).

Bottom line: the desired results will probably make it a lifetime
commitment......unwanted consequences won't.

Wolfgang