Back about 1980 or so, my wifes twin sister and her husband lived in a BEAUTIFUL old house with LOTS of windows. We had a hail storm on a Friday night that knocked about 70 panes. He called me about 4AM Saturday and asked me to come over so we could be at the hardware store when they opened the doors. He knew they would run out of glass quick.
We were at their door with dimensions and got all our panes, old fashioned glazier's putty and some points. We had all of them done by dark and the next weekend the wives painted over the putty.
There has been SO much change in the products used for this, that I expect that today there's stuff that can be painted over immediately.
After you've done one or two with the old fashioned putty, you can put it on, scrape off a beautiful 45 degree bevel, and scrape off excess in no time. Anyone capable of overhauling an MB diesel will get the hang of it in milliSeconds!
The putty knife will be as at home in your hands as a 13MM combination wrench.
Good luck with it.