To be honest i haven't had a pad come off on a board iv sprayed so i wouldn't really know. I suppose the more layers of lacquer you put over the top of spray, the less likely it is to happen. If this pad comes off and takes some paint off with it i could just paint it back in or it gives me the option to do a new design on the board. To be honest though it would be underneath the new tail pad so you would hardly see it.... if at all.
but that's just my take on it. someone else might have some more input?
you may feel differently but if i were you, id just go for it.
what board have you got coming?