Surfboard Discoloration NOT from water leak?

I bought a used board that’s in pretty solid shape. There are very minor dings on and around the nose area as well as some discoloration somewhat close to the nose area. The discoloration has been there since I bought it. Like I said the dings are very small and I can’t tell whether or not the board is water tight because of the fact that there is some discoloration.
So my question is, is it possible for there to just have been some natural discoloration when the board was made? Could the discoloration NOT be a result of water getting into the board?
For some more general info, the board was made by a local shaper in CA then I bought it from a shop who was reselling it. The shop did not explicitly state the board was not watertight, which they normally do if it’s not watertight.
Dunno if u can tell or not but this is my first fiberglass board lol.
So my question is, is it possible for there to just have been some natural discoloration when the board was made? Could the discoloration NOT be a result of water getting into the board?
For some more general info, the board was made by a local shaper in CA then I bought it from a shop who was reselling it. The shop did not explicitly state the board was not watertight, which they normally do if it’s not watertight.
Dunno if u can tell or not but this is my first fiberglass board lol.