I just realized that you can not print white on most printers.  I have the clear water slide decal material. I need to make white iron crosses and white letters for my DO335.  Has any one came up with a neat way to do this?

         

As mentioned use the white decal paper.  It just requires cutting close to the edge of the finished decal or you'll have a white outline.  I only use the clear when I'm making a decal with letters or numbers, to keep the spacing and alignment.  The rest of the time I print on the white paper, since the printed image is more true to the graphic anyway.  Anything printed on the clear paper tends to be semi-transparent.

The problem was to make small white lettering for the tail number on my DO 335.  The final answer was to use a color text box with a white number in the middle.  I then fiddled with the color text box till it matched with the airplane.  Printed it on white bumper sticker vinal stock.  I then cut out the box (cut very close to the number) and stuck it on the tail. Looks OK.