Black Cat Landing - A Witch House

how did you make the chimney look like it was grouted? thats something i would really like to try

the "rock" is paperclay... the grout is actually real grout. Once the stones were dry, I painted them, clear coated them, then grouted.... even with the paperclay clear coated you have to be careful when washing the excess grout off... but I like the way it turns out