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Old Feb 23, 2012, 04:52 PM
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Oklahoma, USA
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Top Flite Elder help

Hi, I'm working on a TF Elder kit and I need a little advice. I ended up airbrushing the rudder with Tamiya acrylics instead of covering it. I need some way of fuel proofing. I have some Krylon clear, but I did a test piece with it and the fuel went right through it. There is only really 2 things I have right now that will fuel proof. Finishing resin or Minwax Helmsman Spar Varnish. I've thought about just brushing the varnish on but I know it will yellow the colours. But I was thinking since this is a vintage style aircraft it might actually give it an interesting effect, or it could just look like *%&!. Any thoughts? I know it's my choice, but I would like to know what others think also. Thanks!
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Old Feb 23, 2012, 05:09 PM
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I would do a varnish or you could water down epoxy and paint that on and that wouldn't turn yellow.
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Old Feb 23, 2012, 05:11 PM
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We used to use clear model airplane dope sprayed over a acrylic paint of some type years ago. I can't tell you what brand or anything about it now though.
You might try some model airplane dope over the paint and see if it works for you or not.
I would try it on a test piece of course.
Here is a pic of my low wing that I made way back circa 1990. It used Acrylic paint with a clear coat of model airplane dope on it. I was still flying it up until last summer when I accidentally killed it.
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Old Feb 23, 2012, 06:56 PM
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Would the epoxy be effected direct sunlight? I've only fuel proofed firewalls.

I'll keep the dope in mind. I'd have to get some though.
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Old Feb 23, 2012, 08:00 PM
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No. Epoxy will soften very slightly when you take a heat gun at 500 deg.
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Old Feb 24, 2012, 12:26 AM
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Ok, thanks, I think I'll give the epoxy a shot. I wasn't for sure if the yellowing would look ok.
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Old Feb 24, 2012, 06:33 AM
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I thought that epoxy would "yellow" too.
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Old Feb 24, 2012, 10:19 AM
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Behr waterbased clear polyeurathne will NOT yellow. Been there, done that.

Les
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Old Feb 24, 2012, 11:41 AM
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wATER based poly U from Minwax.

howell
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Old Feb 24, 2012, 11:53 AM
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The OP is looking for fuel proofing methods. In my experience, waterborne polycrylics are not fuel proof.

Has anyone had a different experience ?

I have had luck with Minwax Polyurethane, but it yellows within a year.
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Old Feb 24, 2012, 01:09 PM
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ya not shure why he's having issues with the clear krylon! once dry should be fuel proof!

but if all else fails, nothing like DOPE!
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Old Feb 24, 2012, 04:08 PM
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Hmm... I tested the matte finish clear for artists. I didn't think about trying the regular clear. I bet they are different formulas. I've got a can of the acrylic enamel clear, #51301 I believe. However I was really wanting a matte finish (I know the epoxy and all that wouldn't give me a matte finish unless I scuffed it up). I just had an idea though, how about the liquitex (I think it is) matte varnish? Anyone have experience with that?
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