UPGP works out to about $1 per car for me.
I have had great success with it on a metallic red corolla, an ice blue metallic Cruze, and my white Ram. The Acura did not pop like the others did after application. It is a deep blue metallic, driven by my 18 year old daughter, and after a few months subject to the odd surface scratches etc. that she never knows how they got there.... This is the car I am looking for something to help mask the blemishes when I am short on time.
The mustang is a show car, and hasn't seen rain in 30 years or more, it is the easiest car to keep as it is never dirty.
Then there is the boat, jetski,..... Lots of waxing/cleaning to do all the time. I enjoy it, but sometimes just need a shortcut to get by. I look at the corrections you have posted (Critic) and I am envious of the time you were able to dedicate to get it right.