Thanx Randy. The reason I'm concerned, is that I normally ride year-round, but with the weather being as it has, I haven't been able to get out regularly, and I didn't top-up the tank at the start of the winter. In the old days, bikes with metal tanks used to rust if they weren't topped up when they were left standing. Guess I'll ask my dealer if there's anything I should do at this point.
For what it's worth, the tank in the picture you posted looks for all the world like black plastic to me, but I'll take your word on it.