If you are running parts that may need to have an extra pass to You can add the code with a "/" at the start of the block. As you can see in this example you could add a face pass...
G00 Z1.0
G00 X0.0 Y0.0
/G01 Z0.0 F30
/X5.0
/G00 Z1.00
/X0.0
G01 Z-.1 F30
...