Primered paint bad for metal in the long run?
I've heard from a great many people that I shouldn't just primer my car and leave it like that because primer tends to trap moisture between it and the paint eventually leading to rust problems. My car's factory paint job really looks like crap and I'd like to do something about it but painting it is out of the question right now due to low funds. So I've thought about primer as the next best thing. But then I've been hearing this.
Also, I've been wondering if there's any way that I can remove the factory GT hood decal on my '86 Mustang? It's actually wearing a white hood from an '85 GT so it looks kind of wierd as my car is black. I'd like to at least remove that decal so it doesn't look as wierd.
Thanks for any input.
1994 GT coupe; deep forest green — totalled August 2003
1986 GT hatch; black — sold April 2005
2002 GT coupe; satin silver — sold March 2010
1995 Cobra coupe; black — still kickin'