I like your videos, helps the guys a lot.
Strip bumper with a 180 DA.
Do the major repairs with the two part Duramix type products.
Clean with soap OR water or waterborne wax and grease remover.
Let set 24-48 hours (very important)
Spray coat of a "flexible epoxy", set set 30 min to 3-4 hours and then spray a couple more coats, let set 24-48 hours and sand with 180 dry, to smooth out.
Use any two part glazing filler at that point for the minor chips.
Sand and coat with 2K primer or epoxy.
Adhesion promoter will be the weakest link, don't use it.
It took me 60 minutes of class time, to go through the steps at the GTO nationals, so this is the short and sweet version.