You require to hear a metal sound and not a dull thumping sound. Practice a bit ahead of time if you can; metal has a distinctive sound and body filler has a dull sound.Ideally you should knock-knock along all sections of the car, particularly on the lower sides.
Instructions
1. Squat down along the rear side of the machine and gander forward, carefulness your eyes along the profile of the entity lines, looking for any waves, dips, lumps or imperfections. They are clues that oppose filler has been used.
2. Provided you examine any waves, dips or lumps, force to that globe and utilize your knuckles to knock-knock-knock lightly on and approximately the suspicious existence.
This machine has intent filler in it.. Cause you be informed where?Before you obtain that used machine you may fancy to trial to flash whether there was ever any target damage repairs done. Is it all metal last the emulsion, or oppose filler very?This course Testament detect larger entire areas on the contrary may not detect ideal limited areas of filler.3. You also want to look very closely into the paint in suspicious areas to see if you can spot any cracks or splits in the paint, which could be body filler that has shrunk and left open splits.
4. If you are liberty to poke a little and you have your awl or pick with you, you could actually poke into an area and scratch out body filler if it is there.
If there is only metal behind the paint you will only scratch out the paint and layers of primer and hit metal. If scratching out body filler, it will be chunky and much thicker than just paint and primer.
A hot spot for bondo filler, especially on older cars, is just below the rear quarter panel, behind the rear wheel. This area tends to rust out, especially if the car came from an area where road salt is used.
