yes, it will rot over time, When it happens to me, I pull every thing out, dry it up as much as possible use a little alchol on it wipe up again, it happens to me on arfs all the time, I hate there tanks sometimes, I just let it be wet alot of the time and fly the sucker. I think they make somthing that can help fuel soaked wood, I don't use it so don't know the name, hopfully someone can post telling you what it is. Its not gonna rui your airplane for life, reality is that you might not even own the airplane long enough for it to be a problem, I have had a trainer for 15 years, counltless full soaks and I don't even really notice it, the wood is dark and soft. it might not be good in high stress airplane though. Your trainer will be fine, watch it for breaks there. Have fun