It's not noticeable once it is mounted, plus if you try and weld it shut, you really have to know your Tig welding or else you'd be burning right through it in no time.
The cheap and most efficient way to repair it would be to smear some metal to metal putty which dries super strong and when sanded and painted, looks like it never was there.
Some guys prefer this agent better than bondo because it has metal particles in the formula, pretty much metal paste in a can.