So I want to pop a bulkhead in my 300g rubbermade stock tank, the siphon (as awesome as it looks) just is not moving enough water for my tastes. So I needed a 3" hole saw, and decided to go cheap on Amazon for a multi-piece set (many sizes) which should be fine popping holes in plastic/acrylic or drywall, but the stuff is absolutely coated in the machining oils too (and probably the "good" stuff from the Chinese factory these guys popped out of!) . So needless to say I'm a bit hesitant to drill into the tank immediately, so are their any tricks for removing these oils? I mean I'm sure Dawn soap would work great for removing it... however I'd bet this is a low quality steel and would probably rust before I even used them if I did that.