was going to use this highly recommended product with a friend next week on his old Ninja tank.

His tank seems to have a vent tube on the back. How should these be covered?

The instructions seem to indicate using duct tape on outside holes (gas filler hole (with cap removed), petcock tube hole?). Not sure what to do as i dont want the vent tube hole to get sealed shut with the sealer. was wondering if anyone had any experience with this.

here is a pic of similar tank with that tube at the top you can see:

can't you stick a stick oop the hole protruding into the tank?