I would question the repair, grinding an angle could be ok, but rot must
be removed and bleach will kill it. Wood puty or Bondo may or may not
last 10 yrs. Durhams will last 2-6 yrs. If you have the money new
windows Argon lowE would be best . 90 minutes is not much time to fix a
window, but who here can say how bad it is, nobody.