For the exhaust stacks here, I just took a scrap piece of the clear adhesive from the Sig star and bar sheet, scuffed it with 600 sandpaper, and sprayed it with silver Lustrekote. After it was dry I then drew in the details with a Sharpie, and shaded areas with a #2 pencil. Then a shot of clear and again after it was dry, cut it out and you have a nice exhaust decal to apply before the final clearcoats on the model. The "Horsin Around" decal was made at my buddies vinyl shop.
