Author: "Rob Ray" <smokyray@...> Time: Fri Sep 19, 2003 8:25 am PDT Link
Hi Bob,
I too used zinc chromate in cans from the hardware store on all of
my interior, and grey Rustoleum in the cockpit. After 1000 hours it
still looks good. Temporarily I used ZC on the exterior of the
horizontal stab since I built it in 89' and I didn't fly until 97'.
When it came time to paint, I had to strip the ZC on the stab and it
was a BEAR. Very good stuff that ZC.
On the exterior I started by washing the entire airframe (sans
fiberglass) with 20% phosphoric acid solution and water with
scotchbrites. I then applied the alodine solution with a large
paintbrush and lots of protective clothes. (alodine is basically
chromium 6, extreme carcinogen)After that the now golden bird was
ready for PPG variprime, 2 coats with light 400 grit sanding
between. I then propped her up on two 50 galloon drums and chain
hoisted the tailwheel spring so I could vary the AOA, stand on a
ladder and paint vertically. The end result, awesome. I did have
alot of "gun" help from a friend who paints race cars and a good
facility. You can build you own booth with stuff from the Home Depot
aviation dept. Total cost of 4 color paint job with sweat equity and
good friends labor? $2200. I have posted a picture of my bird in
the "photos".
Let me know if you have any questions, I'll be glad to help.
RR
--- In RV-4@yahoogroups.com, "Robert Mears" <bobmears50@h...> wrote:
> I posed the following question to a fellow RV-4 builder and he
suggested I
> ask the group. So here goes. I know it is a basis question but
primer must
> adhere to the al. and the paint must adhere to the primer
chemcally as well
> as mechanically. So, they must be compatible. What is considered
the best
> combination for my RV-4? I am using the zinc chromate only for
interior
> parts that will not be painted.
>
> Bob Mears
>
> "I just bought Zinc Chromate from Spruce already in spray cans so
I will go
> ahead with it in a very well ventilated space. What primer and
paint are
> most people using now for the outside surfaces? I have always
thought Emron
> was about the best but I hear rumors of other paints that work
better, last
> longer, apply easier. A litte expert advice would be appreciated."
>
> _________________________________________________________________
> Try MSN Messenger 6.0 with integrated webcam functionality!
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Author: "Robert Mears" <bobmears50@...> Time: Sun Sep 21, 2003 6:20 pm PDT Link
I had a rib or two that were showing signs of some corrosion. The
wing had been in Iowa and evidently transported out in the open and
something probably salt water splashed on a couple ribs. They were
not cleaned at the time and as a result some corrosion set in. This
was cleaned off until the ribs were bright metal. I sprayed the acid
cleaner on it and let it sit for 2 1/2 minutes according to direction
and the washed it, let it dry and then sprayed the alodine solution
on it according to direction and let it sit for 2 1/2 minutes and the
washed it off. I was instructed not to let either solution dry on the
surface before washing it off. I did not get a nice bronze color like
I was led to believe I should. What did it do wrong?
Bob
---> On the exterior I started by washing the entire airframe (sans
> fiberglass) with 20% phosphoric acid solution and water with
> scotchbrites. I then applied the alodine solution with a large
> paintbrush and lots of protective clothes. (alodine is basically
> chromium 6, extreme carcinogen)After that the now golden bird was
> ready for PPG variprime, 2 coats with light 400 grit sanding
> between.
Author: "rv468" <smithfam@...> Time: Sun Sep 21, 2003 7:00 pm PDT Link
Bob,
You may not have done anything wrong. Some alodine or conversion
coatings are clear. In the bottle they are gold, on the metal they
are gold, but rinse them off and it looks like they were never there.
The Stits conversion coating that I am using is like that. I've seen
different alodines listed in catalogs as invisible or visible.
Good luck,
C. Smith RV4 #68
--- In RV-4@yahoogroups.com, "Robert Mears" <bobmears50@h...> wrote:
> I had a rib or two that were showing signs of some corrosion. The
> wing had been in Iowa and evidently transported out in the open and
> something probably salt water splashed on a couple ribs. They were
> not cleaned at the time and as a result some corrosion set in. This
> was cleaned off until the ribs were bright metal. I sprayed the
acid
> cleaner on it and let it sit for 2 1/2 minutes according to
direction
> and the washed it, let it dry and then sprayed the alodine solution
> on it according to direction and let it sit for 2 1/2 minutes and
the
> washed it off. I was instructed not to let either solution dry on
the
> surface before washing it off. I did not get a nice bronze color
like
> I was led to believe I should. What did it do wrong?
>
> Bob
> ---> On the exterior I started by washing the entire airframe
(sans
> > fiberglass) with 20% phosphoric acid solution and water with
> > scotchbrites. I then applied the alodine solution with a large
> > paintbrush and lots of protective clothes. (alodine is basically
> > chromium 6, extreme carcinogen)After that the now golden bird was
> > ready for PPG variprime, 2 coats with light 400 grit sanding
> > between.
Author: "cfznb" <fznb@...> Time: Mon Sep 22, 2003 3:53 am PDT Link
I did not get a nice bronze color like
I was led to believe I should. What did it do wrong?
Bob
Check the label Bob, or take it to a paint shop. If my memory serves
me
correctly, there are two types of alodine, one that leaves a gold
colour, and the other makes no colour change. Either does the job if
you follow directions.
John