20's brick buildings

[LynnB]

These have been really great examples and I think I get the idea now. I also found a picture of how I'd like to paint the two buildings like this

I already painted the building on the left a red primer color and building on left a grey primer color. How do I get the not colored front on left building a concrete color? as well as building on left side walls a concrete color or would the grey primer paint be same. Its just the regular primer paint.

I thought I'd try bumping this up to see if any of you's fine modelers would have input on whether concrete color would be the same as standard grey primer?