When I did mine I only used part of the patch like you are talking about. I started at the door jam with one small tack weld then lined it up. Then did another tack an inch away. Every time I would do another tack weld I would line up the part that was an inch away while it was still hot. Once you start going around the curve it gets harder, but then you hammer it in place while it is still hot. If you go with this method the prettiest part that requires the least amount of finishing body work will be showing, and the part that requires most[the part you had to hammer]will be hidden by bed.
Unless you are some kind of artist it will require some bodyfiller when you are thru. The main thing is to make a strong repair.
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72 GMC Sierra SWB almost finished---- 84 Softail
Olive Branch MS
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72 GMC Sierra SWB almost finished---- 84 Softail
Olive Branch MS
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