I got a bulletproof Tahoma from the mission House Party. Now I wonder if I lose it, can I get another bulletproof car later? Or fireproof or explosion/crash proof. But bulletproof is better.
Cesar's car in the lowrider race is everythingproof, but there's no way to obtain it, maybe unless I spawn a tractor.
Can special cars lose the special ability in some way? I'll try and mod it, will see if it affects the special trait.