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Old 05-18-04, 05:09AM   #1
Richard Ohran
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Default My Latest Bondo Trick

It seems that whenever I use bondo, I put it on too thick or too thin, and then when I shape it, I either take off too much or too little. I have a friend who is an experienced bodyman and comes around once in a while. He always seems to get just the right amount on and needs very little sanding to get it right. Unfortunately, I'm not there yet.

Here is a "crutch" technique that I have started to use to help make up for my lack of experience. I apologize in advance if this is a common technique in the industry... I have never seen it before so I thought I would share it here.

My problem tonight was a "dinged" rocker panel. After straightening it as much as possible with my Unispotter, it needed bondo over a two foot section. It was as much as an eighth inch low over that segment. I gave it a liberal coat of bondo, and then found a 3 foot segment of rectangular tubing:
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Old 05-18-04, 05:12AM   #2
Richard Ohran
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Next, I covered one side of the tubing with clear packing tape.
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Old 05-18-04, 05:14AM   #3
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After that, I pushed the covered face of the tubing into the bondo, squeezing out excess out of the sides which I removed with a putty knife to some extent.
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Old 05-18-04, 05:16AM   #4
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and held the tubing against the rocker panel with some strong harbor freight magnets:
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Old 05-18-04, 05:19AM   #5
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After the bondo was sufficiently hard, I pried off the bar and trimmed excess at the edge of the shiny area created by the bar using my cheese grater.
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Old 05-18-04, 05:22AM   #6
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The area molded by the bar has a perfect contour according to my straight edge.
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Old 05-18-04, 05:26AM   #7
Richard Ohran
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During the final sanding with my air file, I leveled the adjacent areas to the contour created by the tubing with relative ease.

As I said, I apologize if this is a known technique and this has been a waste of space here on the board.

Richard
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Old 05-18-04, 04:19PM   #8
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Helpful information is never wasted space, and it was a good read as well.

Not everyone knows everything
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Old 05-18-04, 07:52PM   #9
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With pictures as well, makes it even better.
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Old 05-18-04, 10:17PM   #10
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Valuable tip -- as a rookie I made the mistake of leaving too much filler on in a couple of places and didn't know how to avoid it.

Thanks......

John
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Old 05-18-04, 10:40PM   #11
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Hmm.....
Even an old experienced dog like me can learn a new trick.

For beginners.. that's a very good idea you came up with there Richard..
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Old 05-19-04, 10:31AM   #12
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I should print this off and show it to my brother-in-law. He's having a hard time with his filler work, and I don't wanna do it for him. :devil
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Old 05-19-04, 11:50AM   #13
Richard Ohran
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I'm glad you guys like this technique. I have also used it very successfully on a door where I was chasing a slight wave over the whole width of the door. The wave was very slight, but very visible in the body line where the chrome strip would go. One application with this technique and I had it.

Richard
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Old 10-16-04, 01:17AM   #14
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to bad im done with my body work,I could have used that trick.. Thanks for the tipmaybe on my next car
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