Printing with White

I printed the Harley image again today, but did so on bare aluminum printing a white base. This allowed me to find a major issue. The RIP software is interpreting the areas filled with white (0% CMYK) as a drop out. At this point the only way to get white to print where I want is to change the value to at least 1% CMYorK. This is not a major issue, but I need to try to find a better way.