The etched glass on the red won't be as subtle as on the silver but it will still be subtle. It will give the red a slight silverish tint (think of the etched glass as a clear vinyl with silver metallic in it.) Another option I could do it a darker red than your canyonrot but that may be tricky to perfect without going to the vinyl shop with your car and picking out a color. There is also a third option which is ghost. It would probably look really good on your car cause it is a tinted clear vinyl so it darkens any color you put it on. I would have to order some of this and it would be $45 instead of $35 but probably well worth it. Let me know.
Dave