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Old 05-17-2005, 06:04 PM
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Hammering out dents?

I've read the post about the dent removal and such, but i have a question. When hammering out the dent with a dolly and hammer, do you hammer the same spot that the dolly is sitting or next to it?
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Old 05-17-2005, 07:20 PM
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Hammering on the dolly (with the metal in between) is called "on dolly" and can stretch the metal. Hammering off dolly is called, you guessed it "off dolly" and it will shrink metal to some degree.

So, the answer to your question is, you do both, depending on the desired result.


Off dolly is usually used to "push" up a dent when there is a crown next to it causing a high spot (very common). You press up on the low area and tap down on the high spot, it shrinks the "extra" metal caused by the stretch and makes it level.

Brian
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Old 05-17-2005, 07:40 PM
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Ok... So I have a dent pushed in on my door, so I'd wanna "off dolly it" to get it to shrink and come back level. is this right? The dent is probally 4" by 1/2 or so deep.
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Old 05-17-2005, 07:54 PM
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Slapper

Lot of us use slappers for this..that is a piece of spring about 12-14" long with a handle..made from an old spring..you can make a wood slapper out of a piece of hardwood with some leather facing on it which works well also..

The trick to the slapper is that it is much easier on the metal and spreads the strike out more so you do not over work the metal..

Using a hammer can stretch the metal and make a worse problem..Just my 2 cents..

Do a search on shrinking disks as well..they work well for shrinking the metal back to where it started..likely when you got the dent the metal was stretched a bit and will need to be shrunk back once you get it slapped out..

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Old 05-17-2005, 08:25 PM
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Do you hit the outside of the dent with the slapper,? with the dolly behind the dent in the center or something.
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Old 05-17-2005, 08:40 PM
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That is it

hold the dolly with a good firm pressure to the back of the panel..(may need a helper) and then a firm "slap" and the dent will pop out..Some of the guys can do this and with the shrinking disk get it to the point that no filler is needed..I am not that good..but this has helped me a lot to do a better job..

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Old 05-17-2005, 08:40 PM
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Yes, You use it like a hammer except you have a MUCH wider face to work with instead of a 1" circle,you have a 2" wide face. Harbor sells some single one's if you don't have a spring handy.
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Old 05-17-2005, 09:39 PM
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Thank you all for you help
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