So I was gifted another '88 Hawk GT

[udman]

Long story...but basically, wife has a friend whose husband died a while back and she wants his old bike out of the house. Didn't know the guy well, didn't even know he rode or let alone had such great taste in bikes. Shoulda seen my face when the garage door opened! Sad part, other than the guys passing is that the tank is rusted all to hell inside. Bike sat for three years and well, it's pretty nasty in there. The outside of the tank is in good shape as is the rest of the bike.

Never had to deal with this problem before but I've heard the diesel and BB's idea and then there's the hard chemicals or the electrolysis methods. Because I've already got a perfectly functioning Hawk, I really don't see spending much getting her up and running again so what's the cheap way to fix this? Is there a cheap way to fix this? I know...I know the carbs!!! I can handle that, just want to know if the tank is a goner before I go rebuilding other stuff.