As soon as I get them both stripped of paint and all surprises revealed, I hope to get a better idea.
You will....I wish I had done that to begin with...if I had stripped them both down to metal to start with, I could have saved a bunch of time...although, I was learning and it was time well spent.
The only way you are going to know for sure is to take them down to bare metal...or you could also make the decision to just replace them and take them off and save time that way.
BUT, if you are trying to preserve the original metal, then stripping them down is the way to go.