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Jan 31, 2013, 08:20 PM
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Discussion

Painting Foam


Helo everyone

My first post here. I am wanting to paint a new a/c that I will be getting and wondering if you thought the attached paint would be ok to use. It will go over the exsisting paint.

Thanks
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Feb 01, 2013, 11:08 AM
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I'd say you're taking a risk. Testors brand works well as long as you use fine coats.
Water based paints works well too such as Krylon brand, but spraying it on evenly can be challenging.
If you do decide on that particular brand, test a small part of your plane with it, somewhere you can barely notice.
Feb 01, 2013, 11:45 AM
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MRGTX's Avatar
ElectFoam,
What kind of foam is your plane made out of?
If it's EPS (beer cooler type) foam or depron, that paint will likely eat it. If you're working with EPO or EPP foam, you'll probably be ok.

Can you share a pic or link to your model?

I agree with gofish...Testors has been ok on every kind foam that I have tried so far.
Feb 01, 2013, 03:18 PM
Registered User
Quote:
Originally Posted by MRGTX
ElectFoam,
What kind of foam is your plane made out of?
If it's EPS (beer cooler type) foam or depron, that paint will likely eat it. If you're working with EPO or EPP foam, you'll probably be ok.

Can you share a pic or link to your model?

I agree with gofish...Testors has been ok on every kind foam that I have tried so far.
I will not recieve the plane until next week, but it is EPO foam. Today I did a test on pink foam and white foam from a shipping box, and did not like what I saw. , So I have decided to go with water based acrylic which I did test on another model and liked the results so far.

Thanks for your replys
Feb 01, 2013, 08:43 PM
Registered User
Quote:
Originally Posted by ElectFoam
I will not recieve the plane until next week, but it is EPO foam. Today I did a test on pink foam and white foam from a shipping box, and did not like what I saw. , So I have decided to go with water based acrylic which I did test on another model and liked the results so far.

Thanks for your replys

Hi, I am actually working in a 737-700 and a MIG-15. And I have a smooth finish using Magikote, a light wait filler "Fast and final" and a water base acrylic polyurethane "Stays Clear" (Benjamin Moore). the surface are smooth and you can not see the shape of the foam, it looks like fiberglass. very happy with the results.
I also bought this week an airbrush and spray gun HVLP, never used those things but I will learn.
Feb 17, 2013, 05:43 PM
1st to the scene of the crash
Laneritc's Avatar
so is it better to use a water base spray primer first? thinking about painting ny Ares Gamma 370 before assembly. Thanks for any advise, Lane
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Feb 17, 2013, 09:53 PM
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primer coat


"so is it better to use a water base spray primer first? thinking about painting ny Ares Gamma 370 before assembly. Thanks for any advise, Lane "

Just make sure the primer is compatible with the cover coat or you will have a gooey mess underneath
Feb 18, 2013, 02:54 AM
bbz
bbz
Registered User
bbz's Avatar
Quote:
Originally Posted by ElectFoam
I will not recieve the plane until next week, but it is EPO foam. Today I did a test on pink foam and white foam from a shipping box, and did not like what I saw. , So I have decided to go with water based acrylic which I did test on another model and liked the results so far.

Thanks for your replys
It really depends on the foam. Most foam that gets used in packing is EPS (expanded polystyrene) Which melts with most spray paint and superglue. From what i hear EPO will not melt with spray paint and superglue.

If you spray EPS in the sun (so it dries fast) and from far enough away with a few light coats you can get away with minimal melting if any.
Feb 19, 2013, 04:51 PM
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Vethraxx's Avatar
I just painted styrofoam using the Short Cuts by Krylon. All was well untill I added the white for the stripes to turn the J3 into a Grasshopper. It ate into the foam, but took a long time to do so. The dark green, and black, no problem. It did not eat through the wing, but certainly made some ditches in the foam. Time to get me an airbrush
Apr 24, 2013, 10:11 AM
Foam crusher
wingman456's Avatar

painting foam


Quote:
Originally Posted by Vethraxx
I just painted styrofoam using the Short Cuts by Krylon. All was well untill I added the white for the stripes to turn the J3 into a Grasshopper. It ate into the foam, but took a long time to do so. The dark green, and black, no problem. It did not eat through the wing, but certainly made some ditches in the foam. Time to get me an airbrush

I have had good success painting any kind of foam by first brushing on a thin coat of polyurethane (commonly used on wood). Allow it to dry thoroughly and then lightly sand it smooth with a 220 grit paper. Be careful not to sand through the polyurethane. Then you can use any normal spray paint to color coat the foam. Make the first coat very thin and spray from about 12" away from the foam. Let the first coat dry and spray again as many times as needed for the desired finish.


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