Park Tool CF-2 Cutting Fluid 8oz. A quality cutting fluid should be used when performing any cutting tapping facing or reaming procedure on a bicycle frame. CF-2 Park Tool Cutting Fluid is an environmentally friendly soy-based cutting fluid that makes any frame cutting tool work better and last longer. Park Tool CF-2 can be effectively used on all metals including aluminum steel and titanium. Always use cutting fluid such as Park Tool CF-2 when machining.