I have to sandblast the hood hinges/springs from my Dart as the car is being painted soon. The hinges as they were taken off the car look like the end the hood bolts to was painted body color but the other end that bolts to the body is unpainted and just greasy looking. Shouldn't the whole thing be painted body color? Also, I was told to avoid blasting the spring directly as the spring will not work as well afterward. Does this sound right? It doesn't look to me like the sand would hurt anything but if this is true I will not blast that area.