Even though I am not considering myself as "mechanical watch" expert (.. so it will be better to have a The Zigmeister type of person answering this), yes ....I do use the "burning process" for my chrono watches.
This is most valid for the 7750 movements (like the IWC you just got ... and some Panerais).
A- I let the watch to run for a week without using the chronos
B- I use the chronos after this first week (if wrong, the watch goes back to the dealer )
C- After this first week , I use the chronos occasionaly but I make sure that the watch was running for at least 8 hours before I use them (... maybe this last precaution is not really necessary).
I do not use any "burning process" on Venus movemnts. This movement is very reliable and strong as a horse. I never had a problem with any of my Venus movement watches.
Hope I helped