well I have been 'reusing' my fouled spark plugs for the last 8 years
i simply put the end in a sandblaster and blast the shit outta them, then blow them out real good with the air gun, regap em', and put them back in the ngk box
i was just told by a reputable builder that this is no good - it doesnt work, the sand destroys some kind of seal or something.....
anyone else have an opinion? i know a set is only $4, but i have so many plugs already, and this seemed to work fine for quite some time for me......