iv done well over 20 repairs on my own stuff, and none of the things i repair need to be repared again, (i got a bit of a paint job to fix up after today at crazies) and its always different placeds that break strait after i repair that section

. but it is the easiest thing to do, if its a crack, easy, if its a hole but harder, because u must get the water out, and it requires digging the foam out puting new foam in than sealing, and making it nice and flush, but just read other threads and you will get it,