From my days as an aircraft mechanic...
Welded tube structures should be welded closed and a small amount of paralketone squirted inside the tube via a small hole drilled in the highest part of the tube. Once the paralketone is in place, the hole should be plugged with a screw, or rivet and some sealer. This keeps thew tubing from rusting inside.
Welded tube structures should be welded closed and a small amount of paralketone squirted inside the tube via a small hole drilled in the highest part of the tube. Once the paralketone is in place, the hole should be plugged with a screw, or rivet and some sealer. This keeps thew tubing from rusting inside.
