Tank look fine! You used vinegar to remove the rust?
No, I wanted to use something that would work a little quicker, so I used "the works" toilet bowl cleaner method. This method is posted everywhere, but these were my steps:
1) removed petcock, poured old gas out, & dried up tank with compressed air.
2) plugged holes with rubber stoppers from HD
3) poured in 3 bottles of "the works"
4) shook tank every 5 minutes resting it on different sides for about a half hour.
5) got cleaner out and quickly neutralized with baking soda/water mix
6) ran warm water through the tank pouring out both petcock & filler holes for about 5 minutes
7) poured water out as quickly as possible then poured a can of denatured alcohol in, swished around for a few minutes to soak up moisture.
8 ) dumped out alcohol and blasted tank with compressed air.
9) once completely dry, I fogged with wd40, then sloshed some gas around. Dumped out gas and poured in another bit of gas and sloshed around... Dumped. (This step was probably unnecessary)
10) installed petcock, filled to the neck with 91 octane & a shot of seafoam and went riding.
Whole process only took about an hour. No pinholes... everybody is happy!
Kyle