It's not that it is not good it's just that it's not new.

In the town I live in, vehicles are plastered with commercial signs mimicing see-through signage that's all over buses.

Your idea is old...like several years out of date but it doesn't mean it's not a good idea because it was, it is, and it will continue to be as long as people are willing to pay the cost of having it done and take it in the shorts when they try to sell those vehicles.