I'll second fluid film. I soaked a piece of cotton T shirt, I keep it in a sealed tin. I wipe them down with it, and then I used another piece to put it back in it's spot so my oils (acidic) are not the last thing to touch them. Does a great job so far. The sprayed T shirt does not have to be recharged, it holds onto enough to last and last. I only use that one for tooling, never projects.. For projects I use a different tin soaked shirt. So there's no swarf in the tool grade.