Hi Considering welding up my molding holes on my 68 coronet. After splitting ways with a paint and body guy i have less then half the holes already welded up. Im not totaly new to mig welding but im not sure if i would leave my car in worse shape after the attempt. Any suggestions? Also what should i do to remove the slight surface rust on the bare metal spots that were already welded up. Should i use self etching primer to cover them up?