Hmm kind of hard to see but do they look like the scale is just colored or does the scale look "funky", like its lifting or corroding/rotting? Honestly, from the pictures, I would probably watch it and make sure it doesn't grow. To me, it doesn't look like a pattern but then again, im not really familiar with BRBs. Maybe someone who has BRBs will chime in. I know they get a silver sheen on them but like I said, those are just a couple scales which makes me worry a little.