I had my aluminum gasoline tanks built by Ezell Industries one of the three
marine tank builders in Perry Fl. I let them decide where the baffles were
( a wise move) also they provided the tank fitting and valves which some of
need to be al. rather than ss or brass. One thing to consider also is the
pickup tubes, they made these with nylon? tubing swaged onto the al tank top
fittings. Some other people I talked to were not up to speed on the issue of
not using metal pickup tubes as they are subject to vibration and fatigue.
Wouldn't want the pickup to break!!! I was very happy with Ezell and the
good work they did.
Then Painting, which I did. This system is my standard and I use it on any
alum. thing I make for boats.
1, clean with acid ectching solution ( like, Ditzler DX533)
2 prime with dupont Variprime 615S self etching primer.
3 finish with several coats of 2 part epoxy primer.
For exposed alum. things, add about three finish coats of a urethane
enhanced enamel like Limco 1234.
All of the products are availble from automotive distributers I think the
key is using the variprime as is bonds to aluminum like nothing else I know
of..

--
Ron White
My boatbuilding website is:
www.concentric.net/~knotreel