Weak hood hinge springs?

HemiDenny said

Had a set of hood hinges dipped to remove the paint...off a 75 Duster...back on a 75 Duster. Now they will not hold the hood up.

As far as I know, the hinges only mount to the body on the pins one way. Can those coil springs on the hinges get that weak over the years?

Any ideas?

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They are made of spring steel, if dipped into certain types of acid, especially heated tanks" they will lose the "spring" they one had. I made this mistake once as well thinking I could dip a set of leaf springs off my w200.... they literally lost all ability to hold the truck up when put back in