Hi Gregory,
If these are old ones, they can usually be re-formed.
Stick a current limiting resistor in line, and put it on charge.
I normally start at very low currents, with a meter in line for monitoring.
Electrolytics do leak a little anyway, but not normally enough to run warm,
unless they are intended to run at more than a few hundred volts.
Old types running at over three hundred volts would be expected to be warm
to the touch, but not actually hot, that would mean excessive leakage and
time to investigate.
They are chemical units and the leakage changes with the applied voltage so
you cant just treat it like a resistor.
If these are quite low voltage caps like for small transistor stuff, just
hold a little nine volt battery in series with a hand held voltmeter on ten
volts, and see that the reading drops. It wont stop reading completely,
cos they all leak a bit anyway, even new ones.
Best of luck with it, John