After you get done removing the rust instead of the alcohol spray down the inside with WD-40 then drain out any excess and fill it with fuel. I did that and it seemed to work great! I tried the vinegar treatment and was surprised how well it did. I see guys using The Works toilet bowl cleaner now as well, i haven't tried that yet but its on my todo list.
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....