Male Speaker : Okay today we just going to demonstrate how to repair a minor dent using a stud nail gun and a body hammer. Stud nail gun is to raise the lows out and use a hammer to hammer down the highs.
First of all, you want to ground your area in order for the stud nail gun to work and the area has to be metal. If there is any paint there, it is not going to make contact and the nail won't stick to. So you want a grind, with something coarse 24 grit that'll get the paint off really fast. One thing you want to be careful although is not to over grind this area. I mean this thing can cause mistakes, grinding too much metal off is a common mistake, you don't want to do that and you also keep the grinder in one spot too long, you overheat the metal and that is because your panel is -- so you want to keep your panel, your grinder moving and you want to do it in bumping header you don't want to do a lot of criss cross with the metals.
Want to be sure to wear in a dust mask and face shield to prevent any injury. And also note, when you think about border -- who is around you, that surrounding glass that you are working on, you want to be sure and sort of welding blanket on it, as these sparks can take glass, or there is others working around you and also if the grinder is working this way, the spark is going to go that way, you can hand direct which way your spark is going so keep that in mind also.
If it is going to go that way --- you might want to move some over there. So basically, to start off with, this is the damaged area right here. I am going to grab at that point and a crash there. Just got to keep that grinder moving kind of fast if you keep at one area it can over heat the metal. Okay we've got the area grinded I also didn't grind too much to over heat the metal, so you can cause warpage by doing that still got the damage you can fill in here, right around here, it is low area. There is not a lot of lows and highs in this because this is just a minor damaged area.
Keep in mind two of these real minor dents, grinding dust produces heat some times that will move some of the dent out on its own. So here is still some minor damage right around on this area. So I feel low right there and you want to be sure that you have your safety glass when doing this too because some times this will create a spark, that's a nail that we put in here. What this gun does is basically when you pull the trigger, and this all makes contact with metal, it'll just basically weld that on to the metal.
So, it's probably such a small dent, probably just one nail is enough. Whenever you see a glow that's good enough, you don't want to keep it on there too long, or else you will over heat the metal, with that on count to 3, 1,2,3 and let off. That easily is about right amount. If it's not long enough, your nail is just not going to stick at all, if its too long you might burn a hole through or else you get it real hot, hot where you cause a lot a additional damage.
Male Speaker: They make different diameters of little studs.
Male Speaker: Yes there is different diameters. These are the smaller ones. So anyway, this is body slide hammer. This can't be used with your nails, you put them on there, tighten it up, pop your damage out. However I really don't like to use things a lot because we want to make the metal go back, you don't work a lot this is going to force the metal, I really don't like to do that-- at same time I like to make it more tight by tapping it on the highs and puling out in the lows kind of roll the metal back.
I'd use this only as a last resort. But as far as this one, I am going to just use one of these because we don't need a lot of force, this will probably do the most of the repairs you need to do. Okay you put this on there, and this is going to pull on your low area and if you remember, there is a little bit of a high area over here not a lot, not like your bigger dents your are going to have but it still has little bit of high area. So still just trying to force that where -- that dent out. I am going to put some force on it, I mean you got a quite a bit of force, you don't want to just hold it, you want to pulling on it, and I want to kind of tap the high area in towards the low area.
As you get the dent to where you think that it feels pretty good, you can take some - something like this to cut, forcing up the nail off and it leaves little bit on there so we are going to have to grind that off. So once we grind that off, we can feel make sure it's where we want it and if it is we can start preparing it for body paint.
Spark's is going to go to that way, also notice that I kind of go on that lightly, I did not want to just sit there and just grind it, till it gets real hot and you got to warp the metal so, let it cool, well I think you want to do is work the metal. Once you determine that it feels pretty good, get enough filler, you are ready to apply the filler. But what you want to do next is we want to prepare it, for the body filler in order to do that we want to cross grind and make it just as rough as possible for the body filler to stick.
So I am going to grind out just a little bit big of an area, and then I am going to do a cross grind. We already have felt of it and we know that it feels good. So once you do that point, there's no need to touch it any more. It's really not a good idea for once its cross grinded and the metal is clean, you touch the metal before you add the body filler because all of your paint may cause an adhesion problem, so we'll go ahead and cross grind it get it ready.
Now, I think as we did a cross grind I am just going to grind it and you'll notice I am just going to kind of do at angles, just to make the patterns cross as much as possible. Now as it is cross grinded there is no really need to touch it anymore, until you add the body filler.
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