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Fast Foam-Wing Fixes

Fast Foam-Wing Fixes

Let’s face it! Accidents happen and when it comes to flying RC airplanes, the chances are sooner or later, you’re going to damage your airplane. There’s no reason to trash your crash. With today’s beautifully molded and great flying foam flyers, you can get back into the air with very little effort. You also can save some bucks by repairing your bent bird instead of buying a new one.

(Above) if you fly, sooner or later you’ll be faced with a repair. Easy fixes are better than buying a new wing.

Dent Removal

The leading edge of the wing can really take a beating but dents are really only cosmetic issues and you can quickly cut away a section of the damaged leading edge and glue in some new foam. (Note: we tried the “hot water trick” to bring the foam back to its original shape, but no dice.)


Use a razor saw and cut the damage out. Cut some new foam to length and insert it into place. Mark the ends of the foam block to match then use your saw and a sanding block to remove most of the unwanted material.


Glue the new foam into place and after the glue cures, Cut and sand the replacement foam flush with the surface of the wing. Apply a little hobby filler around the edges to fill in any gaps and when it dries, use fine sandpaper to smooth the repair.


Use a foam safe paint and apply some matching paint to complete the leading edge wing repair. The hardest part of this repair really is finding matching paint. Usually, the instructions that come with your airplane will call out the colors used. If not, go to the hobby shop and check out the Master Modeler and Tamiya brands of acrylic foam safe paints. You’ll be able to match the color chips and then lighten or darken the colors slightly to match. In real life, warbird repairs seldom matched the rest of the airframe! That’s scale weathering!

Back at the flightline, no one will even know you bashed your favorite warbird. This repair technique is almost invisable and it saves you some coin in the process.



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  1. Can you use any Styrofoam? Sometimes I get Styrofoam in my packages and I toss it out. Is it compatible? If not, where can you buy the correct Styrofoam?

    1. I save hunks from other wrecked airplanes.. It’s not Styrofoam. Years ago I had a couple of Styrofoam airplanes and they were way too weak. Think of the disposable ice chests and you will know how weak Styrofoam is. I think most of the planes of this sort are EPO foam. But anything for small repairs will work OK. Do not use Styrofoam for any significant structure. It’s just too weak. Look around for a tougher foam that still looks OK.. Ask other modelers. Somebody has pieces of old airplanes you can use. Save some from your damaged airplanes in the future too. LIGHT vinyl sparkle from the hardware store is good for those small spaces around your repair. It goes on easy and sands super easy.. Dries fast too.

    2. Yes packing foam is a good repair material as well

  2. A great repair tool for foam RC airplanes, is a thin, flat, Carbide file. A company Cales DuraGRIT sell one that is 1/16”!thick, 1-1-1/2” wide, 9” long and has half the surface coated with coarse grit and the other half in fine grit. Rough sand the repair block down to the surface with the coarse end, flip the tool around and smooth the repair down to the surrounding foam surface. The 1/16” edge has grit particles welded to the steel tool, which means you can use the edge as a grit saw to cut out the damaged area in the first place. 3 tools in one and being Carbide, lasts a lifetime. It’s called HT-FS9-612 Flat Sander. At Duragrit.com

  3. What do you recommend for the adhesive or glue to use when repairing the “wing dent”?

    1. Either 15 minute epoxy (just a dab), or Zap Canopy adhesive. Both work very well.

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