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Jan 15, 2002, 04:53 PM
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Gman2's Avatar

A skin[sprayable] for epp foam ?


I saw a scale glider with a foamy wing and fuse that was aerobatic and light. the only thing that detracted and very little was the tape. If anyone could figure a skin that could be painted for foamyflage ,we could have delicate ships that are crashable. A graphite rod could be placed at the leading edge and at the aileron split for spar. The one I saw the guy just filed and sanded the fuse.
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Jan 16, 2002, 03:39 PM
Certified Slopehead
tenover's Avatar
I just built one. Spraypaint your fuse/wings, get some Marine Goop, thin it out with Toulene and brush it on. Absolutley indestructible...
Jan 16, 2002, 05:48 PM
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Ben74's Avatar
what's marine goop? is it Goop brand glue that says "for marine use" on it, or is it something else? does it come in a tube?

how smooth does the surface end up? is it transparent? got any pictures?

does painting with thinned goop add a lot more weight than tape or ultracote?

this idea intrigues me. i'd like to know more...

thanks,
ben
Jan 16, 2002, 06:38 PM
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davidfee's Avatar
...but where did you get the toluene? I don't believe it's available to the general public anymore. At least, not in California.
Jan 16, 2002, 06:47 PM
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poobs's Avatar
What is toulene? is it like MEK?
Jan 16, 2002, 07:40 PM
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davidfee's Avatar
Yes, toluene is like MEK (in that it's a volatile organic solvent) but it's more toxic. The EPA/OSHA etc. have put it on the endangered organic species list.
Jan 17, 2002, 10:32 AM
Certified Slopehead
tenover's Avatar
"Marine Goop" comes in a tube. There's also "Household Goop" and "Plumbers Goop", but there's a UV protectant in the Marine stuff. Toulene is the thinning agent for it, and I mix it to a "chocolate syrup" consistency then brush on one coat, let it dry overnight, then do 2 more. It does add a little more weight, but it's bullet proof. I'm using this method on my slope planes. It also goes on clear, so you can get some pretty good paint jobs underneath....I'll post some pictures tonight.
Jan 18, 2002, 04:14 PM
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tenover's Avatar

Gooped Fuselage


Here's a picture of the Gooped fuselage. I painted it first, the thinned out some Goop and did 3 coats.
Jan 18, 2002, 04:28 PM
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poobs's Avatar
We are not talking about gooping regular foam here - right? only the type of foam use in something like an FMA Razor
Jan 18, 2002, 04:29 PM
Registered User
Ben74's Avatar
looks pretty good. not super smooth, but close enough. i wonder if something like spray foam would work. you know, the yellow stuff in an aerosol can that expands after you spray it. maybe you could spray it on, let it expand, smooth it out with a spackle knife, let it dry, then sand it smooth. i may give it a shot, just for kicks.

i've heard of people covering EPP with light spackle, but that obviously would not be very durable. the spray foam might be a bit tougher...
Jan 19, 2002, 09:37 AM
Certified Slopehead
tenover's Avatar
Poobs....Right, you mean like EPP? Well this IS EPP.
Jan 19, 2002, 10:05 AM
EB-66C Team Member
J Morgan's Avatar
Be careful on the quanities of Toluene that you buy. It is registered with the DEA as a substance used in making crack cocaine. We use it in cleaning and stimulating oil wells. We buy it in truckloads and are registered and regularly inspected by the Feds. They track even small quanities of it pretty closely.


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