Ok I just ordered some ironx, never used it before but will post my thoughts.
I recommend using it BEFORE claying. And make sure to rinse it thoroughly. Also don't leave it on for more than 10 minutes.
I usually spray it on, wait 5 min, use a wet microfiber and spread it out to make sure it gets everywhere, then rinse.
You can use it on your wheels as well.
TIP: Do NOT store it with the sprayer in the bottle. Keep the reg top for it for when it's not being used. Mine have consistently leaked when I've left the sprayer on the bottle.
And just to let you know, the stuff STINKS really bad... like rotten eggs and perm (for your hair). SO use in a well ventilated area... like outside! LOL
Good luck!