Diyvehiclerepair
- How do you prepare metal for Bondo?
- Should Bondo be applied to bare metal?
- How long should Bondo dry before painting?
- Does Bondo harden without hardener?
- How do you sand and Bondo a car?
- Should you prime before body filler?
- Do you sand Bondo between coats?
- Can you paint directly over Bondo?
- Why is Bondo bad?
- How do you know if a car has Bondo?
- What is the ratio of Bondo to hardener?
- How long can bondo be left unpainted?
- Is bondo waterproof?
- How long after filler can you paint?
How do you prepare metal for Bondo?
First step: Prep the Surface
Before applying, paint needs to be sanded to the bare metal. 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).
Should Bondo be applied to bare metal?
Do not slap Bondo onto a smooth painted surface, it is not going to stick very well. The paint should be sanded off, to the bare metal, and then apply the filler. A 36-grit to 180-grit surface is ideal for body filler application so that the filler has a good rough surface to grip.
How long should Bondo dry before painting?
Allow the putty to dry 15 minutes at 77 degrees F (25 degrees C). In cooler climates, putty may take 20-30 minutes to dry. 7. Using 3M™ Sandpaper 80 grit, sand and shape the filled area to the contour of the surface.
Does Bondo harden without hardener?
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.
How do you sand and Bondo a car?
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. Cut in with heavier grit sandpaper and work out to about 80 grit to leave a tooth for the following skim coats.
Should you prime before body filler?
Do not proceed to Primer Filler stage until filled area is even. Adding body filler AFTER primer filler should be avoided to prevent possible adhesion, staining and shrinkage concerns.
Do you sand Bondo between coats?
Between each coating, sand the hardened putty with 80-grit sandpaper to remove excess Bondo. The coarse sandpaper will also rough up the surface giving it the tooth needed for the subsequent coating of Bondo to achieve good intercoat adhesion.
Can you paint directly over Bondo?
A direct application of Bondo Ultimate over sanded or cured primer and paint is possible. After applying this filler, it is easy to sand.
Why is Bondo bad?
Unfortunately, filling compounds such as Bondo also present some drawbacks. Fillers like Bondo can crack if they are mixed too thickly, 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 dent repair filler like Bondo.
How do you know if a car has Bondo?
Easy way to tell is to place a magnet on various body panels. Place it especially on the quarter panels, rocker panels, any area where rust can develop. If it won't stick, that's where the Bondo or filler has been used.
What is the ratio of Bondo to hardener?
Place the proper amount of Bondo filler and hardener: 50:1. First, place the filler on the mixing board and then place the hardener. 3. Mix with a plastic or metal Filler Spreader.
How long can bondo be left unpainted?
Between life and work, the longest time period the bondo would go Unpainted would be about 2-3 weeks.
Is bondo waterproof?
Bondo Fiberglass Resins and Repair Kits are 100 percent waterproof. Because they do not shrink, they are excellent sealers. Bondo Fiberglass Resin is sandable in less than 2 hours, is compatible with all paints, and creates a strong and long-lasting bond.
How long after filler can you paint?
Run a wet finger or knife along the filled line, pushing it into the gap. Use a damp cloth to remove any excess. Allow the line to dry at least 30 minutes before taping and/or painting. If painting with oil based paint or if the joint is large, allow at least 48 hours.
