I've used SEM Rock-it like HR4DR55 did above and found the texture to be rather subtle as well -- I'll be going with it again on my '57. I tinted it in the same fashion -- just pouring in paint to the mixture. This was a solid color, so can't comment on how it'll look with a metallic. It did match the rest of the body color just fine though, there wasn't any noticeable difference outside of the texture and shine. It cleaned up fairly well, but we never got it all that dirty to begin with.
I don't think that problem is nearly as pronounced on the Tri-Five -- the inner fenders are hardly noticeable from most angles due to the rear quarter overlap and how far inset the fronts are. That, coupled with how low his car is, you're not likely to notice them unless you're getting up close and personal.