Q&A for How to Apply Bondo

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Question

My Bondo is lumpy. Should it be smooth?

Community Answer

Yes, it should not be lumpy at all, Get new Bondo and new hardener, mix some up, and you will see how it is supposed to be. Close the lid tight to prevent it from getting lumpy.

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Question

Should I use Bondo to repair a half inch deep by half inch diameter hole in a wooden cabinet?

MR KYLE W

Community Answer

No, Bondo is not the best for hole repair for anything made out of wood. Bondo is designed to be used for automotive body repair applications. Wood filler is the best choice to fill hood holes.

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Question

Can Bondo be applied to fiberglass?

PhoenixHall

Community Answer

Yes. There is a type of Bondo with fiberglass in it, and that's usually what to use.

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Question

Can I use Bondo to fill a rust-caused hole in a truck's interior floor?

Kyle Weston

Community Answer

That may not work. Bondo is intended for minimal surface imperfections like small dents. Rust will continue to deteriorate around the Bondo, causing it to fall out eventually. It's better to remove the rusted metal, neutralize it, and replace it with new material.

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Question

If the spot is still indented after the initial application, can I apply a second layer?

Camren Sloat

Community Answer

You can, but it won't be as strong. It's best to make the dent even with the surface for a smooth and durable finish.

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