The tank is out of the car. Upon inspection I found a rust patch at the bottom of the tank. The photo below was taken through the opening for the filler neck (the neck is removed). I have a hand held sand blaster and I am thinking of extending its outlet with a tube and shooting the rust with walnut shell. Another option might be Evapo-Rust but it will likely leave some crud in that area. I am looking for insight and/or ideas for getting this fixed. Thank you.
