Table of Contents
Can I paint right 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.
Should Bondo be primed before painting?
You should use a “direct to metal” (DTM) primer to help top coats stick to the metal but it’s not needed under body filler most of the time. Once the metal is primed then you can apply a “filler primer” (2K) to help hide scratches and minor surface irregularities.
How long should Bondo cure before sanding?
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 acetone remove Bondo?
Acetone will remove at least some fabric along with the embedded Bondo. Apply the acetone to a cleaning cloth and wipe the affected area thoroughly. According to the Aftermarket Product Department of 3M, the Bondo should release from the fabric fairly easily.
How do you keep Bondo from sticking?
When using ANY type of filler to re-create a corner or straight edge, clamp a smooth flat piece of scrap wood sprayed with WD-40 under your repair. WD-40 is an excellent lubricant that prevents fillers from sticking…and makes it easy to remove once the Bondo or Wood Filler is dry!Aug 18, 2015.
Can I wash body filler?
There should NEVER be a need to clean body filler. Grease and Wax remover should be used in the steps much earlier on in the process. Once you start sanding and grinding it should be done over clean metal with no traces of grease or other contaminants.
Can you use wax and grease remover body filler?
Re-prep the area by cleaning the panel with wax and grease remover. Before applying any filler, wipe the surface with wax and grease remover and a tack rag to ensure a clean and lint free area.
Can I use grease and wax remover on primer?
G&W remover will only soak into filler and be a strong potential for weak adhesion of successive topcoats of primer and paint. Not a good idea; windex either. Filler should be wiped off with a dry paper towel, blown off with clean air – no moisture coming from the hose – then primed.
What happens if you put Bondo over paint?
Fillers and putties will normally work OK over properly sanded (80-180 grit) cured OEM paint. We recommend that all paint be removed where filler is to be applied.”Nov 3, 2012.
Can I paint directly on body filler?
They need to be primered with a fill primer (not epoxy). If you don’t prime the filler then the filler will absorb the paint, which will end up looking like a bullseye in the paint after you’re done.
Can body filler be applied over primer?
Applying body filler over epoxy primer provides maximum corrosion protection for the metal. Apply filler within seven days of applying epoxy primer to maximize adhesion.
What grit sandpaper do I use 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).
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.
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.
Can I wet sand Bondo?
Don’t wet sand filler. Filler is too absorbant and you can have problems getting it dry plus you could cause moisture to wick through to the metal or weaken the bond between the filler and the substrate.
Does cold weather cure Bondo?
If you’re talking about body filler (bondo) you can use localized heat so that it cures properly. A small heater or heat lamp can keep you going all Winter as long as you’re doing one or two panels at a time.
Will sandblasting remove Bondo?
Sandblasting can be used to remove Bondo and other similar putty-like polyester automotive body fillers. While removing Bondo can be done with sand or other abrasives like garnet and aluminum oxide, more modern abrasives like EpiX and KinetiX can remove Bondo more safely and effectively.
How do you clean metal before body filler?
Lightly sand it just enough to make it look like it has all been sanded. Blow off and clean with wax and grease remover again to get rid of sanding dust. Make sure the wax and grease remove is completely dried out before using filler. I would recommend allowing at least a couple minutes, just to be sure.
Do you have to use hardener with 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 is the best surface to mix Bondo on?
Proper Mixing Techniques for Body Filler (Bondo) Mix on a Spreader Mixing Board designed for the job. Do not mix on cardboard, cardboard will absorb the important resins from the body filler and hardener. Place the proper amount of Bondo filler and hardener: 50:1. Mix with a plastic or metal Filler Spreader.
