i would allways take it up, i was just interested in your reason
the pin prick hole could also hapen when painted directly to the floor, the water will be hidden under the layer of paint, in the VW scene people have used Dynamat and a bitumin tar on the insides, this cuts down on " tin can rattle " you get in vans and on the floor it cuts down on road noise, it works, except when water does get behind it, you cannot tell and it starts to rust