Step Five
Working on our outside panels layer
Selections: Select All : Float : Defloat
ADD A NEW LAYER :
Select your Airbrush with these settings
With White as your foreground colour draw a line in the centre of the panels starting and ending just short of the frame
(if it helps you can rotate the image 90 degrees to get the long panels neat and straight)
Blur : Gaussian Blur : Radius 8
Lower the layer opacity in your layer palette to 70%
Step Six
Repeat the Last step for the Inner panels
Changing the settings for the Airbrush to this
Step Seven
Working on the Hearts layer
Selections: Select All : Float : Defloat
Notice I have changed the size to 35 and the opacity to 45 and the blend mode to Luminance
With a darker version of your heart colour draw a small V shape around the dent at the top of the hearts
Step Eight
Working on the thick Middle Panels layer
Selections: Select All : Float : Defloat
ADD A NEW LAYER :
Select your Airbrush with these settings
wWith the very centre of the brush on the marching ants draw round the panels
including the connecting slanted lines