How do you remove hardened Bondo?

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In this regard, how do I make my body filler straight?

Likewise, people ask, how do you Bondo a curved surface?

Regarding this, how do you sand Bondo fast?

How do you shape Bondo?

How long does it take for Bondo to fully cure?

Bondo mixed to the color swatch will begin to cure in less than 10 minutes at room temperature. Too much hardener in a warm environment will reduce working time, but too little in a cool environment can result in maddeningly long curing times. A heat lamp can speed curing in colder weather. 4.

Is Bondo hard to sand?

Once the Bondo cures, it’s time to sand. Power sanders are OK to break the surface and knock down any high spots, but hand sanding with the body contour is the best way forward. … The lightweight Bondo Gold is far easier to sand than the heavier type, so consider using the good stuff on the way out.

Is it OK for Bondo to get wet?

the moisture will be trapped between the metal and the bondo. something about it yes the bondo will dry out but it traps just enough between the two to cause problems most likely way down the road. there is something about it that makes it harder for the moisure to escape than it was for it to get in.

Should you prime before Bondo?

Bondo over time absorbs water causing rust to form underneath. It can also shrink over time causing paint to bubble or peel off. If used………..the metal must be primed first.

What grit do you use for Bondo?

First step: Prep the Surface

Make sure to sand outside of the repair area as Bondo will need to be spread and applied wider than the damaged area. (36-grit to 220-grit should do the trick for body filler application). AutoBodyNow.com sells a vast assortment of sandpapers and sanders to complete this step.

What happens if not enough hardener in Bondo?

Without it the bondo won’t get hard. Put a small piece of bondo on a board and run a line of hardener from end to end. It will take about five minutes to mix it up and apply it. If it starts tacking up, stop applying it or you’ll mess it up.

What happens if you don’t add hardener to Bondo?

(Bondo comes with a tube of hardener.) If you add too much hardener, the mixture will gel too quickly. If you add too little, it increases the amount of time for it to cure, and if you don’t add enough it will never cure.

What sandpaper do you use to sand Bondo?

Directions for Use

If grinding is needed use a 3M™ 36 or 40 grinding disc followed by 3M™ 80 grit sandpaper if no grinding is required, sand the surface with 3M™ 80 grit sandpaper to remove all primer, paint and rust 1 to 2 inches beyond the outer edges of damaged area. Remove all dust created from sanding.

What sandpaper is good for Bondo?

Use 60 to 80 grit paper to sand down below rust, deeper scars or to sand down and begin to shape body filler, such as bondo. These are very coarse grits and should only be used in specific areas where you really need it since it will leave sanding marks.

Will Bondo eventually harden?

As you stated, Bondo does not harden quickly in the cold but I would think 2 days is plenty. Maybe ya got a bad batch or its old or the freeze did it in.

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