One isn't too bad, just a bit too red, but the other is really
reddish. Is there anything I can do about this? I just wanted to
age them somewhat (I wanted them to turn a bit gray).
Liver of sulphur doesn’t color silver to first a light grey then
darker and darker, etc. As with many instances where an oxide or
chemical layer is built up gradually, the colors go through the
spectrum first (think of the anodized colors in titanium, which of
course are much brighter). Your problem is not enough action of the
liver of sulphur. You’ve only just barely started to react with the
silver. Remember that the gel isn’t intended to work cold, right out
of the bottle. Mix a little bit with HOT water, to get a nice dark
solution. Then dip the lockets until they turn black. Burnish with a
soft brass brush, and repeat.
You’ll end up with a uniform “gunmetal” blue/black color that will
look much nicer for you, I think. THEN take a polishing cloth or a
buff, etc, and buff the high spots. The more you do that, the lighter
that grey will become, including in the recesses, to the extent you
can reach them. It’s possible to take it back to mostly silver with
just a little bit of antiquing in the recesses, but the key to a good
look is to get it actually fully darkened first. You can, of course,
just lighten what you’ve got now. But the recesses won’t be grey,
they’ll have that reddish tint they now have.