Whitening teeth before dental bonding a good idea?

I am going to get my front teeth bonded in about a month due to these bright white stains i have always had on them. However I wanted to whiten my teeth beforehand because I have heard that you cannot whiten bonded teeth. Is this true? and if it is, is it a good idea to whiten my teeth before I have them bonded? and finally what is the best at-home tooth whitener product?