Graffiti Wall

In the next exercise the objective is to write on a wall as if the Graffiti has been there for a long time, using the ¨Blend If¨ option from the blending options menu of a layer I could get this done, playing around of course with the different underlying layers colors... the result below... thought I´d use Lank Shop for my text... remember its supposed to have been written there since the building was first built...