not answering your question re sealant which should be ok too ... all the above can work. even the flux core works. go slow and add a quick spot on the edge of the pin hole, let cool, clean, spot again til the area is complete. if the hole is small enough you can often plug it in one shot. if you can get a light inside the tank it can help to spot holes. the flux and errant wire can lodge on the inside which may or may not be a problem. yes gas shielding is better. seams can have contaminants buried in them. brazing works well in so many conditions. tig works wonders. if there's a field of pinholes, cover with welded patch or cut out and fit a patch.
This post was edited by rio4000 on 03/06/2022 at 08:43 am.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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