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Scientific Tuesdays – Removing dents with a hair dryer?

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Today I will attempt to remove dents from metal using a hair dryer and some canned air. The theory is that if you heat up the dent long enough, that the molecules inside will expand fair enough away from each other to make the metal more pliable. The next step is to QUICKLY freeze the metal with canned air. If you flip canned air upside down, a freezing liquid comes out. Let’s try this experiment together. .
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  1. you shouldnt cool the middle, just the outside

  2. Not a very smart approach. Don't even know his metals either, said the second one was done on aluminum but anyone can clearly see it is stainless steel.

  3. Cars are mainly fiberglass so it won't work on metal…try that

  4. john the bus driver

    u need to push from the inside

  5. if that actually works what am i going to school for this then

  6. leave the heat on longer

  7. ils workin on plastic not à metal dud

  8. pro-tip: buy a saturn.

  9. I've seen my husband do this to pretty large dents with only a hairdryer

  10. can this work on my social life

  11. that was retarded… this not the same kinda surface as a car frame either.

  12. im no expert, but im almost positive that the surfaces youve heated, already cooled down before you spray. alluminum cools down in a split second

  13. Jody Carlos Borrageiro

    that is not even a suitable analogue for a car…. seriously…. why did you even bother…

  14. Hahaha! You are not doing it right pal. The cooled part needs to be closer to the center of the dent, and heated part to surround it. What you did is applied heating and cooling to the same are, which would not instigate the compression or expansion of the material in a way that would make the expected change of shape.

  15. I just wasted my 4 minutes on this loser.

  16. you guys are mean and did i mention are No Name losers, check yourselves before you judge you clown of men.

  17. you didn't do it right

  18. You are a Fucking Dork!! That Was Not A Scientific comparison to a larger flat panel of an automobile.
    If you put water on a fire will it go out??? Then go piss on a Fucking Forrest Fire!! Did it go out?? Hmmmm
    A single match generate 1200 degrees??? Then try heating a gymnasium with it!!! Did it heat the gym?? Hmmmmm

  19. Wasn't a fair test.

  20. If we are to be scientific enough we have to make sure we are testing the same materials with the same properties such as hardness, thickness, elasticity, plasticity etc. And of course the deformities introduced in the above experiments cover something like 80% of the width of the items, the equivalent deformity in car would be massive. In any case, good to experiment

  21. Moronic Tuesdays souds much better

  22. That's so funny!!!!!😄😄😄😄😄😄

  23. This dude don't even have a car.

  24. How about steel and not aluminum or tin?

  25. It workes

  26. Will this work on a iPhone?

  27. derp, way to science bro was not a car in the vid is retarded.

  28. idiot, it doesn't work on creased metal!
    and if you have access, you push out on the inside

  29. Well, its a metal called nitenol. ==> shaped it ==> dent ==> heat it up == pups back to its original state

  30. A Hairdryer is definitely hot enough for this method. A heat gun will in fact strip the finish of your auto.

    The dents in this video are not suitable for this method. Once the metal is creased to a sharp point, the thermal contraction of metal cannot overcome the surface strain holding that dent in place. Aluminum is not particularly suited, because of it's thermal properties (very high thermal diffusion) and because of it's low resilience (ability to store energy or strain elastically). Although aluminum has a very high expansion coefficient which may help overcome these other factors somewhat.

    Sheet steel is perfectly suited, and this can be witnessed in dozens of youtube videos

  31. yes it is but not the deep bent dents your trying it on it works on large shallow dents in flat surfaces only ..

  32. Won't the heat gun cause the paint work to bubble?

  33. if you like then u shoulda put a like on it wo oh oh wo oh oh wo oh oh wo oh oh

  34. Nightingale Rail Productions

    is that CO2 coming out of the air can?

  35. My car got a huge dent on the bumper and all I did was blow dry it for 10-15 mins not "45 sec". And then I pushed it from the inside back out . Guess what it worked so don't listen to this moron it worked on me but just use a hair dryer and blow on the dent for 10-15 mins and then go under the car and push the debt out

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