I am usually advising them throughout the renovation process on choice of finishes, colors, and other renovation choices to help them get the top dollar on their flips.

What works best can vary dramatically just based on the wording or timing of your letter, placement of signs, color of door hanger, etc. 

I rubbed some on a hidden tile and it seemed to tint it very well, I think if I went with an ebony color it might do just the trick, then I could go over it with rejuvenate or some other basic floor coating every few months to help seal it in.Thoughts or suggestions?

I've been studying and looking at multi-family homes here, San Carlos Park, Bonita Springs, and Cape Coral.  

Charcoal greys are in style for colors!  

I agree with @Jo-Ann LapinThe Inland Empire in great, strong blue color towns are the best option for you.

On the other hand, I love branding and thinking about my company logo and color and typeface, but that's just something that interests me.

We also just recently used another Select Surfaces (not sure of the color) in one of the houses we were putting flooring down in for the homeowner. 

Learn all that you can about everything and remember that the profits are all the same color of green.

Apparently the aluminum siding was considerably thicker and more damage resistant and the coating that provided the color and graining to the panels was more costly and had a longer lifespan.The FTC lost that case.