Poker Zombie
Royal Flush
I oiled my first CPS chips, maybe 3 years ago. I've oiled CPC chips in April 2015. Nothing has ever needed oil to be re-applied.That's an interesting technique. You've used it on other chips before that have since seen many hours of play, right? How does this method hold up over time? I thought that since oil doesn't evaporate, you needed to work it into the chip's pores. Here, you're just applying it to the surface.
Chips will naturally get oiled by handling them. The more they are played, the more oil they will collect - unless you play while wearing nitrile gloves. Who knows what measures people will take with the coronavirus? Otherwise, the first coat of oil is sufficient until the build-up of oil gets to the point you need to wash the chips.
I've never known anyone to wash their China clay chips except to remove factory dust, and most home game chips will never see enough action to build up "hooker-juice" gunk.