I was looking for some possible help with a project I am going to attempt. I am finishing my basement in a sports theme and was wondering if anyone could share some tips with me. I want the stairs going down to the main area to look like a tunnel in a stadium. Does anyone have any techniques that would help me make my walls have the look of a concrete poured wall that you might find in a stadium. I've seen people make walls look like marble and such but haven't been able to find anything that would help me achieve the look of concrete. If anyone could help or maybe direct me somewhere that I could find some help it would be greatly appreciated.