okay, i have been searching the forums for a couple hours now finding every bit of info i can about cleaning a rusty tank... from Zippy's suggestion, i went out and bought some KREEM... it says in the instructions to use the "coating" IMMEDIATELY after using the first 2 steps (to prevent immediate rusting)... however, form what i gather.. i could technically do the first 2 steps and just keep oil/gas mix in it to prevent further rust.. right?
my main beef is i do not want to have to use the "coating" as its a 78 motobecane, and the tank is not removable... and im not too keen on the idea of taking the entire engine and everything off to shake up the frame... especially since most of the cables are in kinda rough shape and most likely wont go back on too smoothly...
another option is just to simply set the entire KREEM product set aside and use CLR or something... but there are pretty heavy rust deposits inside the tank... i flushed about 3 gallons of kerosene (and about a 2 cups of acetone) through the tank, and gas will flow through freely... and appears to be clean... but there is still rust in the tank... so i know i need to do more.
if i keep oil/gas mix in the tank could i conceivably get away with just getting an inline fuel filter and keeping an eye on it? i cant even really begin trying to get this running until the tank issue is solved, cuz i dont want to have to keep tearing the carb off every 20 minutes...
so basically, my questions are:
could i just use the TANK PREP A from the KREEM set (i have already spent the $$ on it) and then some dry gas.. then keep oil/gas mix in it?
should i just get CLR or some other phosphoric acid and use that?
if the gas seemingly flows freely out of the petcock hole, can i just use an inline fuel filter and be done with it?
thanks for all the help... and even though i tried to be as thorough as possible, im sure i left something out.. so...