You can use plastic/metal 2-part epoxies. Repair epoxy is also a good alternative.

Is Harbor Freight Bondo any good?

The putty spreads smoothly and is ready to sand in less than a half hour. This versatile body filler works equally well on wood, aluminum concrete and fiberglass. The 3M 32 oz. Bondo Body Filler (Item 67721) has a 4.5-star rating on HarborFreight.com.

Is Bondo a permanent fix?

Bondo Body Filler cures fast, shapes in minutes and is formulated to be a non-shrinking and permanently durable material. In addition to its uses on vehicle exteriors and other metal surfaces it is also a suitable repair option for wood, fiberglass and concrete.

How long does it take for Bondo to cure?

When used according to the manufacturer’s recommendations, Bondo takes 10 to 15 minutes to dry enough to form a sandable surface. After 45 minutes it’s cured enough to be painted.

Is spackle the same as Bondo?

Spackle is soft and is intended for interior use. Bondo is for larger areas and can be difficult to use.

Can I use car body filler on wood?

Auto Body Filler Is For More Than Cars. A winner for a variety of wood gluing and other repairs! Auto body filler is an excellent wood filler and adhesive. It sets up quickly, has great adhesive properties.

Will Bondo fall off?

Because it’s not a permanent product, Bondo will fall off eventually, even if it’s after ten years. In the meantime, Bondo should stick on your car.

Can you Bondo over rust?

To Bondo or Not to Bondo

Minor surface rust can often be sanded and painted, but major rust pitting and holes may require a little more effort and material — specifically, Bondo or some other quality body filler. However, Bondo shouldn’t be used on every kind of rust hole.

Which is better Bondo or fiberglass?

Fiberglass is More Durable than Bondo

The first key difference between these two is in regards to durability. Fiberglass is way stronger than Bondo resin. Therefore, when you use fiberglass filler, expect it to outlast car parts that have Bondo.

What happens if you use Bondo without hardener?

For Bondo to work, however, it must be used with a hardener. On its own, Bondo won’t get hard. This means that it will not cure and eventually fall off after application. Because of that reason, Bondo must be used with a hardener.

How thick can you put Bondo on?

So in the spirit of political correctness and repeating the party line ” Ideally filler should never be more than 1/8″ thick “. In real life I have seen bondo from another persons previous repair be two inchs thick and last 15 years or more with no problems until the car was damaged again in the repaired area.

Can you paint directly over Bondo?

It is best not to paint directly over body filler, for one, paint will stick to it forever, and the filler will suck up the paint and it will be harder to cover, so if you just shoot directly over it, you may have some problems.

What’s the best Bondo to use?

The Best Car Body Fillers
3M Bondo 261 Lightweight Car Body Filler.Permatex 25909 Liquid Metal Filler.Evercoat 156 Lightweight Car Body Filler.