When I found I needed to Smoke the sights again, I dug out the old GunSmoker and ... it was really a Pain in the ... ah... butt.
I did some research and talked to some folks and found the Ray-Vin Supersmoker. High Power Shooters are using this these days.
I ordered one this evening... I don't NEED one for matches, but I do like to smoke the front sights on several of the guns.
http://www.ray-vin.com/tools/smoker.htm
You DON'T want to smoke the plastic sights or any sights with PLASTIC inserts. (duh) Those you can paint with flat black model paint, or spray with Birchwood Casey Sight Black.
