Ok I'm not sure about the thin brisa overlay as that could have issues of IRS own if is to thin ,
my own experince with clients who had brisa nails had a re balance and wanted shellac , I re balanced, refined, did top gloss cured then applyed the shellac color blah blah ....
So no base coat
You could probaly do this over any enhanced nails if you used brisa top gloss but I maybe wrong ,
It dose have to be buffed off if you do it over gel or L&P but that was fine they. Just leave it till there next app,
Polish is just as good and long lasting over enhancements but I do have to say shellac dose look fab on them to :£