ok after not being able to work on my truck for awhile. I went to the shop the other day to get back to work. Most of my body work is done. I found surface rust on the baremetal areas. Will there be a problem with my already finished body work. Bare filler no primer. was put over bare metal that was prepped.
I know there are a few that insist prime before filler and some who dont.
I am worried i will have to remove all my body work and start all over.

Can the rust be under the filler also, or am I ok to just clean the metal areas back up and procede?
Thanks
Dave