I just read what feels like a million posts about spark testing and couldn't find this answer, so I thought I would break down and ask.



When I test something, can I use a cut off wheel, or do I really have to use a grinding wheel? In my head it shouldn't make a difference either way, but I have a few things that I thought for sure were stainless, but I can't get them to spark, even in the dark. I would really like to start the day at the scrap yard tomorrow and I have no desire to go to the store right now.