I have what appears to be surface rust on the main beam in my basement. At places you can peal of thin pieces. The house is over 20 years old and at one time had a water problem. My question is should I try to treat this somehow (clean it up, seal it some way?). I recently bought the house and the home inspector (nor a structural engineer that looked at the house) didn't point it out. I am just wondering...an ounce of prevention?