<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
AFAIK, paint will not adhere to anodized aluminum. Try it on your home
window frames and see.

I had all small aluminum parts (which would not be painted) anodized, but
the ones that would be painted, I alodined then zinc-chromated.

On the smaller push-pull tubes, I ginned up an appropriate-sized bore brush
on the end of some heavy-wall .375 O.D. aluminum tube about 6' long. I then
chucked up the tube in my 3/8" electric drill [be sure to use a G.F.C.I.
electric outlet] and broke the glaze on the I.D. of the tubes. Then I
etched and alodyned in the usual manner.

On the larger I.D. tubes, I used an automotive brake cylinder hone. It
worked well as long as I lubricated it with water during the honing
process. Be sure not to take a lot of metal off!

Also, I found that the alodine finish came out much more even when I
constantly rubbed the workpiece with a cotton ball. Otherwise, it came out
mottled.

Oh yeah, one other tip. Prior to etching, be sure to wet-sand the workpiece
with 320 grit wet-or-dry sandpaper until water does not bead up on it. Then
etch, then flood with water for at least five minutes to remove all traces
of acid. (The purists out there can use litmus paper to verify this.) Then
Alodine.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>