As a small BUT Very BIG Addition PLEEEASE
Use a respirator welding
I Know it Sucks with a helmet and all BUT it sure beats the alternatives of The Big Dirt Knap or an Iron Lung for the REST of Your Life eek eek frown
Any weld thru primer ESPECIALLY 1 with zinc in it is GONNA give off POISONOUS GASSES when Burned
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Regards AND Stay Safe Steve Sr. smile