Can you use whitening strips/other while doing Invisilign?

I see this has been answered and the answer seems to be YES you can use whiting strips/other while doing invisilign. My question is: once those brackets come off some off, won't you have a small discolored mark there because this area was not whitened? This would be using crest white strips not using the invisilign trays. and I'm specifically concerned about the spots where the brackets are.