Body putty?

I’ve got my ‘64 K completely disassembled and I’m almost finished welding in patches. When they built the car they ran body putty along all the seams…even the seams that weren’t tight. I’ve found a couple spots where, if not for the putty, the car would have leaked. So should I just re-putty the seams or would body filler be a better idea?
Author: myskin