After going with regular spark plugs for 1500 hours, I switched to fine
wire plugs. They are better. I get lead deposits around the base of the
plug, but they start anyway. I can go 500 hours without a cleaning,
though I wouldn't recommend it. Also, from what I have heard, they last
virtually forever. Just be careful with the sandblaster, they are
delicate and an agressive sand blast could destroy them. They are
expensive, but worth it. No more spark plug cleaning except at annual
now.