Charlie Kuss wrote:

Hi George:

        The way I usually do it:

        1) Clean w/ MEK, acetone, etc. to degrease.
        2) Etch w/ "phosphoric acid": Alumiprep or equivalent 2-3 mins.
        3) Rinse clean w/ water
        4) Alodine w/ Alodine 33 or equivalent until a pleasing light gold to
            light brown color appears.
        5) Rinse clean w/ water.
        6) Air dry and don't touch the surface.
        7) Prime and topcoat as usual.

        Tips:
        You can get the Alumiprep and Alodine 33 at any airport or
        paint supply house. Wear gloves and don't dump this stuff down
        the drain as the alodine has a heavy metal ( chromium? ) in it.

Listers
 The above is good advise. However the products are AlumiPrep 33 and Alodine 1201.
Dupont and PPG also make equivelents of these products.
Charlie Kuss

 
The AirCraft Rotary Engine NewsLetter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org