so something is telling me to ask for advice before I stick this into my multimeter and risk damage to the device, component, or more importantly, me.
become dangerous to use.
You can easily reform any electrolytic capacitor by charging them up through a 1K resistor and leaving them over night on charge.
Years? Probably not worth it.
It's an old radio hams trick used on many war surplus radios in the 60s. These hadn't been powered up for nearly 20 years and they almost always fully recovered.