Drilling Spot Welds, What do you use? Options

[obscurity]

I have been drilling spot welds as I work on my car and it occured to me that there may be a better way (or maybe I am being to picky). I am curious what everyone else uses.

I have been using a spot weld cutter. It looks like a short drill bit with a pilot point and little cutters along the edge. It will cut through the top layer or steel but not the back layer (usually). They will cut about 10 welds before being hoplessly dull. When I was buying them at $5/bit it was fine but that company went out of business and the ones I find now are $25/bit. Are these the right tools to use or should I be just using a drill bit allthe way through the weld.

Any help or tool suggestions would be appreciated. (IMG:style_emoticons/default/smile.gif)

Thanks,
John W.

[cary]

https://www.blairequipment.com/spotweld-cutters

https://www.airgas.com/product/Tools-and-Ha...CoaAib8EALw_wcB

Ditto on what Perry said. I use a Rotabroach when needed.
Primary technique, die cutter wheel and wood chisel. Peel it back like a sardine can.

I can go all day on one bit. But I use Hougen dipping sauce in each spot weld.
https://www.airgas.com/product/Tools-and-Ha...-0aAsBREALw_wcB
I get my replacement cutting heads thru AirGas.
Most important info. Keep head perpendicular to the spot weld. And let the tool do the work work. No pushing.
Oh yeah, your going to break a few on the after lunch or beer break welds. Two stacked on top of each.