Rust. Body filler is not good for rust repairs. You cannot slather some Bondo over rust and expect it to stop the rust or stick to it for that matter. If there are holes in the metal, you are much better off cutting it all out, patching it with new metal, and then working the body filler from there.
Also asked, will Bondo stick to rust converter?
Bondo should adhere to the rust converter. The best way to do it (from what I have seen) is to go down to metal, clean / remove all rust, put metal prep (acid) on metal, add filler, paint with best primer you can (epoxy), then paint.
One may also ask, can Bondo be used over paint? Bondo Ultimate can be applied directly over sanded and cured primer and paint. This filler remains easy to sand for days after the application.
Beside above, does Bondo cause rust?
yes you are wrong. bondo absorbs moisture so the rust will still rust. unless you put an epoxy sealer on it. rust is like a cancer.
Can you put Bondo over rust inhibitor?
Using rust inhibiting primers that are zinc or phosphor rich will be the best bet for reducing rust recurrence. Bondo, or whatever else you use, should never be more than 1/8" thick. So at that thickness, it doesn't matter if you put it over primer or bare metal.
Is Bondo a polyester resin?
Bondo is a trade name for a common automotive filler that is polyester resin and typically talc. The Bondo name is used like Kleenex to refer to any mix of polyester filler. Epoxy is not polyester. Both are excellent for use as filling agents with wood.How do you use the reformer in Rust?
Pour a small amount of Rust Reformer into a separate non-metallic container. Brush the material evenly across the surface to be coated. The Rust Reformer will dry to a black film in about 15 minutes. Do not return any unused Rust Reformer to the original container.Can you fiberglass over bare metal?
Fiberglass will stick just fine to bare metal but you need to use the correct resin. You need to use epoxy resin. Clean the metal with some solvent and grind with a disc grinder to get all of the rust of and to roughen the surface, then glass it using epoxy resin for a permanent bond.How long should Bondo cure before sanding?
Generally, in a matter if a few minutes it will start to harden and get rubbery. At that point, you can carve it up with a utility knife, a hand planer or a bondo rasp. Just make sure you leave enough to do a final sanding, usually within 10 to 15 minutes you can start sanding it.How long can Bondo be left unpainted?
about 2-3 weeksWhy is Bondo bad?
Filler has long been a standby for repairing small car dents. For one, Bondo that is mixed too thickly can crack, harming rather than improving the look of the car. Additionally, there's a risk of discoloration and poor long-term wear when you use a filler like Bondo.How thick can you apply Bondo?
There is no minimum thickness for Bondo, but there is absolutely a maximum. You do not want to apply body filler to anything that is thicker than about a 1/4”. That does not mean it can't be done, but the repair will not last as long.Is Bondo waterproof?
Bondo Fiberglass Resin is designed for repairing cars, boats, snowmobiles, jet skis, bathtubs and showers. Bondo Fiberglass Resin is waterproof and is compatible with all paints, including gel coat and marine paints.How strong is Bondo?
Bondo is amazingly strong and is very easy to work with. The mixing ratio seemed vague so I went with 8 drops per 3-4 grams, on wax paper on top of a scale.How much is a gallon of Bondo?
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