i really prefer tourmaline since it does cause less damage towards the hair and is over all better [in my opinion]but i have a hard time finding one that is really good at a fair price.i currently like the ghd, but its ceramic. should i keep looking for a tourmaline or just get a cermaic flat iron that proves to straighten but doesnt have a heat dial [causeing more damage D:]
use zep degreaser,, or pine sol do not waste your money with wheel cleaners, they do not work any better than pine sol or zep degreaser but are far more expensive
NEATHER! get the instyler rotating iron. it straightens or curls ur hair while polishing it. and it doesn't cause any damage. here is their site
depend what type of things have you done to your hair in the past if your hair has never been dyed or been used in chemicals then you could use a ceramic iron