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Hangar Flying / Re: Paint: What did YOU use?
« on: April 29, 2012, 02:21:37 PM »
"add a reducer to make it MORE viscous" SHOULD have read "add a reducer to make it
LESS viscous"
It is CRITICAL to use the right reducer, depending on the temperature. I live in
Washington state. A month or so after painting, I need a different reducer if I need
to repaint. Guess how I know this.....
If you fail to sand the surface of the primer (now on it) EVERYWHERE, the new coat may
flake off in spots due to oil or other invisible junk.
If you sand, then prime, then fly, you will have to SAND AGAIN later. Maybe you should
NOT fly it in primer.
PPG recommends that you clean the surface with an approved solution. If you do that,
the approved solution will go through any pinholes and dissolve the foam underneath.
I made a new aileron due to that little problem. PPG thinks that you are painting a
metal car.
The primer and paint are great but the hardener will shortly become junk due to exposure
to oxygen in the air. You will need to buy new hardener after a few months. That gets to
be quite expensive.
PPG does sell a one-piece patchup paint. You should get some that matches the paint color
when you buy the paint as tiny imperfections can be touched up without mixing hardener,
reducer, and paint.
You should pick a commonly used white color (there must be hundreds of "white" paints)
in your favorite auto supply store, even though you are not buying your gallons from
them. They carry spray cans for some white cars. Then you are NOT bound to PPG
for later touchup, as you can get a spray can from the auto supply store.
NEVER consider using IMRON unless you have a professional painter do the painting;
it is too toxic. The PPG paint is dangerous enough; you need total clean air, as outside
the shop AND a special mask for painting.
Many years ago Ken Miller published a short discussion in a Central States Newsletter
regarding the filling of tiny imperfections AS YOU PAINT, with your PPG. You should find
that discussion; it was invaluable to me. When you spray and "run out" of paint in
the cup, there is still a tiny bit of paint. Before it hardens, you add a little micro, mix,
and apply to any tiny spots that need a little fill. Of course you need a helper to be
cleaning the spray gun at the same time or you will have a gummed up spray gun.
Bruce Hughes
LESS viscous"
It is CRITICAL to use the right reducer, depending on the temperature. I live in
Washington state. A month or so after painting, I need a different reducer if I need
to repaint. Guess how I know this.....
If you fail to sand the surface of the primer (now on it) EVERYWHERE, the new coat may
flake off in spots due to oil or other invisible junk.
If you sand, then prime, then fly, you will have to SAND AGAIN later. Maybe you should
NOT fly it in primer.
PPG recommends that you clean the surface with an approved solution. If you do that,
the approved solution will go through any pinholes and dissolve the foam underneath.
I made a new aileron due to that little problem. PPG thinks that you are painting a
metal car.
The primer and paint are great but the hardener will shortly become junk due to exposure
to oxygen in the air. You will need to buy new hardener after a few months. That gets to
be quite expensive.
PPG does sell a one-piece patchup paint. You should get some that matches the paint color
when you buy the paint as tiny imperfections can be touched up without mixing hardener,
reducer, and paint.
You should pick a commonly used white color (there must be hundreds of "white" paints)
in your favorite auto supply store, even though you are not buying your gallons from
them. They carry spray cans for some white cars. Then you are NOT bound to PPG
for later touchup, as you can get a spray can from the auto supply store.
NEVER consider using IMRON unless you have a professional painter do the painting;
it is too toxic. The PPG paint is dangerous enough; you need total clean air, as outside
the shop AND a special mask for painting.
Many years ago Ken Miller published a short discussion in a Central States Newsletter
regarding the filling of tiny imperfections AS YOU PAINT, with your PPG. You should find
that discussion; it was invaluable to me. When you spray and "run out" of paint in
the cup, there is still a tiny bit of paint. Before it hardens, you add a little micro, mix,
and apply to any tiny spots that need a little fill. Of course you need a helper to be
cleaning the spray gun at the same time or you will have a gummed up spray gun.
Bruce Hughes
