Standard H2O2 sold in the drug stores (chemists) here in the States is a 3% solution, not the ?6% or 12%? you see in the UK. Nearly harmless.
Sodium Bisulphate is just Sparex #2 (pickle) without the pricetag. It’s often used around here to adjust the PH in hot tubs. Only sold in granular form. Many of the metalsmith types buy it from pool suppliers as Sodium Bisulphate because (A) it’s loads cheaper than Sparex #2, and (B) it’s actually more pure. Go figure.
Americans almost never use Sulphuric pickles any more. For 90% of us, if you say pickle, you’re talking about some sort of sodium bisulphate solution, and the rest are probably using vinegar or citric acid.
That said, as someone who grew up in a chem lab, I agree with you: if you’re going to talk about chemicals, please be precise.
But to get back to the original question, yes, a 50/50 mix of fresh sodium bisulphate pickle mixed with drugstore hydrogen peroxide will get the pink oxide off brass. It’s a pretty aggressive solution, so keep an eye on it and get your piece out as soon as the pink’s gone. It’ll also go after silver soldered joints, so be careful it doesn’t etch your joints to the point where you can’t polish out the line. The peroxide is photoreactive, so the solution will start to lose effectiveness in an hour or two, and will just be normal pickle again by the next day. (The H2O2 just degrades back to H2O, and dilutes the bath.)
For whatever any of that’s worth.