If You have Worm Oil, definitely use that. If not, many Oils will suffice "for the time-being". You can use Natural Oils, but most of those can Gum over time, so using "Plastisol-oriented" oils will be Your best bet for the duration...BUT, in the Short Term, know that even Natural Oils wash off easily before they gum (that does take awhile, to gum-up) and Aluminum Injection Molds wash easily, so You're definitely not shut down.
Me, I use "Now" brand Almond Oil from GNC to lube Injectors and what-not, so I don't get any "artificial smell" and that Oil is readily available so I can easily re-up when I need to.
I wouldn't hesitate to use other Natural Oils in a pinch, I'd just watch for gumming and make sure I maintained-very-well anything I used those Oils on. It's always a good idea to inspect everything, periodically, anyway.
A light coat of Oil in the cavity/cavities will help with their Sheen. A little Worm Oil after curing will help, also.