Hey Meg, I think the Brass Banisher and/or the Shine Gloss would be totally fine to use as an "adjunctive" type of treatment to your regular colour sessions... they're not going to add any NEW colour in - will just add shine and in the case of the brassiness one, change the tone. It's basically the same thing as the toner you'd get at the salon.

If you're nervous maybe wait to see what reviews come up - I like to check Makeup Alley. They only have one review so far but it's positive: http://www.makeupalley.com/product/showreview.asp/ID=130420/Brass_Banisher/LOreal/Hair_Color/

And yes, these should be in stores this month!