what colors can i mix to give me aged concrete? - Model Railroader Magazine

Over the years, I have used many, many colors of Floquil Polly Scale Acrylic paint.

One of my favorites was Aged Concrete because it looked so similar to the real thing. 

When Testors discontinued that line of paints, I set out to replicate the Aged Concrete color, and I believe that I succeeded.  

Here is my formula, using white as the base:

White - 10 parts

Green - 2, 3, or 4 parts (to suit your preference)

Undercoat Light Gray - 2 or 3 parts (to suit your preference)

D&RGW Building Cream - 2 parts

Red - 1 part

Brown - 1 part

Yeah, I know, it sounds crazy, but gosh golly darn it, it works.  

At one point, I tried to add Yellow, thinking that might be necessary, but don't bother with yellow.

If you cannot find D&RGW Building Cream or Light Undercoat Gray, then just use a generic cream and light gray.

I really experimented with the green and gray to get the right proportions, but just start with 2 parts in each instance and just add more to suit your preference for the exact desired tint or shade.

In my opinion, that formula is spot on to match the prototype.

Just use an eye dropper to start our using "drops" for the "parts".

What I did was to dip a tooth pick in each jar of paint and place drops on a piece of wax paper to experiment until I was satisfied that I had the ideal proportions.

Let us know what you come up with.

Rich