I saw car show and I recall them using an electronic device like a tuning fork which detected the thickness of metal and if bondo was used in a car. Does anyone know what this tool is called and where to get them?
That thing looks like a stud-finder. I'm guessing its the same thing? Would make sense, all stud-finders do is detect higher densities, and bondo spots would be denser than a thin layer of metal.
The one as reviewed in HPP not only detects body filler, it can tell you how much is there, whether it be just a skim coat as part of a proper repair or gooped on to hide a beat-up or defective panel. It comes with a calibration tool so you can be more certain of it's findings.
A magnet will tell you whether you have metal or filler, but it won't easily tell you how much. An owner may be less than receptive to you passing a magnet agross his paint job, too, if what he is representing is a well-cared-for machine.
why are you wanting to know if there is bondo ie body filler in a place you cant see it? Body filler is perfectly fine to use on a car, and if it hasn't cracked or separated where you can see it, then it was done properly and most likely never will. Just wondering what your concern was with finding it?
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