Much ado about buzz boxes but for most people they do just fine .I really can't imagine most posters welding high pressure pipelines or submarine pressure hulls . It's usually something made of mild steel and most of the time it's rusty steel .A buzz box using fast freeze rods like 6011,6012 or 6013 will get the job done .If you want to lay down more faster use 7014,7024 iron powder rods . 7018 for AC/DC does fine but don't get them mixed up with standard 7018 DC rods .You'll find out real quickly that's not what you want .