First, since your VX is white, paint them white to match the rest of the VX.
However, if you insist on continuing with the red option, read further...
Second, before you apply paint, go to your local Home Depot (or hardware store), find the electrical supplies area and look for colored electrical tape by 3M. You should be able to find red, blue, green, yellow, and of course - black. Not sure if there is a "white" electrical tape. You could substitute some medical tape from a local pharmacy. Cut strips, and apply the tape over the area you are considering painting. Trim the excess with a sharp blade. Back away to a distance such that you cannot see the edges of the tape strips...and admire.
I found that removing the fangs from the grille made the above process a lot easier.
I posted a picture of my painted (proton yellow) fangs a month ago. I used the yellow tape first to make sure I was going to be happy before I applied actual paint. I also found that you will have to rough-up the area before applying paint. There is some kind of clearcoat finish on the fangs.