Any experience with a rust preventative that doesn't leave behind (or minimally) a film of oily-greasy goo? Maybe you can't have one without the other? Machining plastics and can't have goo on the mill table, as well as contaminating alu. sheet on the shear. I suppose wipe off the goo, run the job, then re-apply is a solution. But I'd like to find a better solution that isn't so messy.