Fuel proof paint

I have a spot on my new plane where high nitro fuel destroyed the dope finish. I wonder is there a clear automotive paint that is resistant to high nitro fuel & ok to spray over dope finishes??
John

John is using "high-nitro" fuel in a PA motor? What, 20%? Or, oh no, we're all going to die! 30%?

You could try be a little less sloppy when fueling your model.

See you this weekend?

John- Any of the new polyurethane clears should work fine. You'll have to scuff the dope finish lightly so the clear will adhere properly. I have it on my bikes & it's really tough stuff. I friend of mine had a leaky front brake master cylinder on his shovelhead & it dripped brake fluid (DOT3) on his tank without damage. It was on there for a few minutes too. If brake fluid doesn't hurt it nothing short of paint stripper will.

Dan,
I used 20 % I had the plane upside down & the fuel leaked onto the pads. pretty bad.
John

John, I hope that wasn't on the new Impact's B-25 Silver. I was wondering where you get your Powermaster YS 20/20? Steve

Steve,
Indeed it is the new Silver Impact & I buy my Powermaster 20/20 at Abernathy's.

> Steve,
> Indeed it is the new Silver Impact & I buy my Powermaster
>20/20 at Abernathy's.

What motor are you running?

Has anyone noticed that Powermaster is now calling YS 20/20 Satio/YS 20/20? I talked to them about that at the Nats last year.

Brad,
This is a Saito .56 .I am just starting to get this this to come in for me .It really is a strong engine.
John

?Theother? Can we call you Theo for short?

The carrier guys use clear epoxy over the colored paints. It always worked for me. I used 40% nitro at the time. It doesn't rub out as nice as automotive paint.

> I have a spot on my new plane where high nitro fuel
>destroyed the dope finish. I wonder is there a clear
>automotive paint that is resistant to high nitro fuel & ok
>to spray over dope finishes??
> John

Certainly. DAU75/DXR 80 is very fuel resistant, if you can get it. Whatever Phil Granderson has been using (some sort of clear from a basecoat/clearcoat system) is pretty tough, too, as long as you let it cure properly.

I guess I'm an old fuddy-duddy, but I hesitate to try anything new in paint. I've had too many bad outcomes. Spray cans of Rustoleum sounds great, but I will stick to straight Brodak from now on.

I've painted cars and full size airplanes with automotive paints. I seem to have poor luck with model planes and anything new.

Hi John,

can't wait to see this plane. I was beginning to think it was just a rumor.

I have Ditzler 2to1 on my last couple of planes. Nitro doesn't seem to bother it at all. The Shoesting has this on it and after I had the clunk tank explode (long story) and completely soak the nose, I just wiped it down with a little alcohol and it was as good as new. No apparent damage.

It's the biggest reason I started using this stuff.

Randy,
The true rumor is that "The Cutting Edge" is going to "fly" at the Labor Day Contest in Poatland OR. This is only a Rumor.
John

P.S. Now this is contingent
on the amount of GOOD FISHING going on at the time.

John,

There's a Labor Day contest in Portland? And I so planed on sleeping that weekend.

>Hi John,
>
>can't wait to see this plane. I was beginning to think it
>was just a rumor.
>
>I have Ditzler 2to1 on my last couple of planes. Nitro
>doesn't seem to bother it at all. The Shoesting has this on
>it and after I had the clunk tank explode (long story) and
>completely soak the nose, I just wiped it down with a little
>alcohol and it was as good as new. No apparent damage.
>
>It's the biggest reason I started using this stuff.

Randy - could you tell us what the formal reference for this is, like the proper name and/or part #?

Brett,

The last plane (the Shoestring) is done with Omni, I think MC161 with MH167 hardner. Shoot, I'll run out to the shop and look...

...Yep, that's it. Mixed 2-1.

The previous plane (the PA plane I flew at Albany) had Ditzler Concept DCC (DCU2002) urethane clearcoat with DT870 reducer and DU5 hardner mixed 4-2-1.

The Concept stuff is OK, but really, really heavy. You have to go very easy on it (as I learned the hard way), but it has the advantage that it has a built in plastisizer so it doesn't get brittle. The Omni (made by Ditzler too) is just as tough but quite a bit lighter in the end and cheaper too. But you have to be careful since it tends to get brittle. There's a plastisizer available for the Omni that I plan to try next time. The Omni seems to shoot a bit easier than the Concept, too, but that just may be the hardener and mix I choose.

I should note that the weight difference is marked. The Shoestring came out at about 43oz after balancing (can't believe I had to add 2oz to the tail). The total weight added with clear was right on 2oz. The PA plane, on the other hand is about 73oz. And I can tell you that a lot of that is clearcoat. About 9oz. worth. Guess which one I plane to use on the next plane?

Hope that helps.

Randy Powell

Sorry for the edits. Can't type worth a darn tonight.