When/if you do decide to remove it you will have a hard time, as the 3 coats will be very thin, as you said you only used 11/2 cans. I used almost 3 1/4 cans, about 6-7 coats and managed to get large pieces at a time off.
looks great!!
I would also plastidip the front mazda badge black so it goes with the grille. also remove the mazda 5 badge off the rear for a cleaner look.