Is the fz1 gas tank double layer? I need to pop out a dent on the side

HI everyone,

I just bought a 2006 fz1. I need to revive it a lil. It was in someones back yard for a few months so aside from needing a major cleaning the left side of the gas tank has a dent. It's not a sharp dent. It looks like a blunt dent that might pop back out but I've never done that before. I was watching videos with the blow dryer method and reading about the compressed air method. I was even thinking maybe I can put my really long screw driver and push out from inside but if the tank has 2 layers then I probably can't do anything.
 
It's a single layer tank. If you can push it out, make sure the tool is blunt or else you will see the marks on the outside of the tank.
 
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