Muriatic acid-clean gas tank

Al L. in Wisc.

Well-known Member
I removed gas tank from Farmall 340 and have acid removing rust in tank; what can I use to plug the two top holes and when inverted, the bottom hole, to hold the acid in the tank? currently I have the tank in a small storage barn as it is raining and directions state don't add water to acid, also for ventilation.

I used a flashlight to peek at the progress last evening with tank on side and results are amazing. Any other tips and tricks for this process is appreciated.
 
I used auto body filler to plug rust holes when cleaning out the inside of a gas tank. It worked for me but every situation is different.
 
Put the cap in a zip baggie and put it back on the tank. The plastic will protect the cap from the acid,and a pipe plug has worked for me more than once.
 

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