Quote:
" ... Rounded electrode tips don't provide good spark, and the exotic metal can hold the sharp edges longer. ..."
That point is something I have always done with other ICS's.
If a SP, Sparks. Just square up the electrode with a small file.
'And it will just keep on, ticking'.
Some folks, don't know. But on a
'tune-up', it was common to, 'Sand Blast' plugs.
Their was even a special machine for that.
(Which of course, made the edges, 'rounder')