[Spits] Cutting spot welds

[Charles Reid]

I tried the circle cutter bit that you have.  Maybe mine was cheaper than
yours but I found that it got dull very quickly.  Then 
I decided to simply
grind out the old spot welds.  This worked OK but took a long time.  After the
old panels were removed (I replaced several panels), I started to reassemble
using a hole punch and MIG welder.  I'd punch one side of one panel, usually
the new, fit the panel in place, fill all the punched holes with the MIG
welder, grind down the results and was ready for primer and paint.  If I had
thought about it ahead of time, I could have simply drilled out the spot welds
(all the way through), fit the new panel, and fill the hole on the back side
with the MIG welder.  This would have hidden all the welds, being on the back
side of the new panels, and been a heck of a lot faster.  The downside would
be working from less accessible locations, but in my case the car body was on
a 'rotisserie'.  I hope this description makes sense.
Charles Reid
1980 Triumph Spitfire