How do I know if my bumper is painted correctly?

My bumper was repainted by the body shop.





Now I want to put those full stick-on bumper guard on it. I was told if the body shop did not repaint it correctly the paint will peel off if I ever remove the bumper guard.





So how would I know if the bumper is painted correctly like a factory painted bumper?





The body shop is pretty reputable and was recommended by my insurance.|||if they use good material it shouldn't peel off , most shops use use plastic additives to assure good quality