Wing fuel tanks part 1 - skin and rib preparation
Wing skins were edge smoothed, deburred mostly with sandpaper followed by a very light touch of the deburring tool, edge seamed then scrubbed with EkoEtch.
Also documented is how I had to deploy the washers supplied with the AN hardware in order to ensure sufficient centering the hardware and also to ensure the nuts did not bottom out on the small unthreaded region on each fitting

Ribs and other hardware after scrubbing

Fuel tank skin after scrubbing. This was done all over, inside and out. This was done with 320 grit Vlies and EkoEtch - enough to create a reasonable key for the flamemaster

Edge rolling top and bottom, but not yet the join to the leading edge

The leading edge skins were also edge-rolled topside. To do this I had to remove the first three rivets on the interior ribs in order to be able to lift the skin sufficiently to fit the tool.

Planning washers for fuel inlet - exterior (none)

Planning washers for fuel inlet - interior (thick)

Planning washers for breather - exterior (none)

Planning washers for breather - interior (thick)

Planning washers for fuel return - interior (thick)

Planning washers for fuel return - exterior

6x 20mm diameter washers were made from 6061-T6 to provide a sufficient grip for the 4.8mm rivets used to seal the machining holes
This post is from Adam Dickson