Took apart the left tank. Deburred all holes. Used tank dies to dimple stiffeners and ribs. Edge smoothed skin and rear baffle.
Began roughening the seam areas on the inside of the tank skin. Taped around the seam areas and used a palm sander/150 grit, then "smoothed" out the roughened skin just a but with Scotch-brite pad and elbow grease.