Hi, I have a '68 that's been in the family since I was a kid. I have it parked because I think I need a new engine. It's always had some small rust spots on it but I noticed the past couple of years they are starting to grow. What would be the easiest and cheapest temporary fix until I have the funds to have them fixed at an auto body shop? Also can anyone give me an estimate on how much it would cost to fix them? I'm in Los Angeles and it seems like any place I go they want me to pay their...

1968 Mustang rusting