How do I remove a rear welded panel from a car?
Answers:
drill out the spot welds with a special (inexpensive) "spot weld cutter tool."
there will still likely be adhesive/ sealer in the seams that will then need to be pried apart.
use a grinder, a cutting bladed hand grinder, or oxygen/acetelyn torch (blue tool)
cut it out slightly smaler than the new one you have to put in.
You need a pneumatic chiseling tool. However, It can be done by hand with a cold chisel or with an angler grinder but its not so easy as with the former.
Don't mess around. Get a plasma cutter.
I would suggest that if you are having to ask the question, you do not try using welders, plasma cutters etc. In fact, because you will need to weld a new panel in afterwards, I would suggest that this is not a job for you to tackle on your own.
There are many good body shops about who can do the job for you.
If you have to do it, probably start with an angle grinder to cut out the bulk of the wing and then trim back the remainder.
Practise welding on some spare material before doing the real thing!
If you need to ask then...
If its spot welded, (you can tell by a regular line of sunken circles on the seams) drill out the welds (sunken circles) with a spot weld removal drill and then separate the panel. You will probably need a Bolster chisel for this.
If its seam welded, continuous weld, you need to remove the bulk of the panel with a chisel or a saw and then grind the welded seams away with an angle grinder. Bloody hard work and not recommended for an amateur.
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