You mean the VVTi & V6 letters on the engine block cover? But they're already painted a nice silver. What do you plan to do out of curiosity?
I was wiping down the engine bay of my SE last night. Since my paint is dark in the engine bay I was trying to imagine what it looked liked if the plastic block cover was silver with the center part black. I know it sounds strange but try to imagine an SE's silver trimmed shift knob color scheme but reversed for the cover. Be a nice contrast to the dark engine bay since mine is Shadow. Hmmm... As for the paint I would not know, but has to be tough to withstand all that heat.