Pink patina on brass RPF Costume and Prop Maker Community

Hey folks, I'm having a bit of a problem. I'm doing some brass etching, but the end product will always have this pink patina to it. I've tried sanding it, polishing it with steel wool and scrubbing it to kingdom come with brasso but to no avail. The picture I'm showing had all three done to it

Limited Run - 1979 ALIEN - NOSTROMO CREW UNIFORM

What techniques and tools can be used to create realistic-looking props for film and television? - Quora

Mechanized: My prop collection (Updated: 7.8.20)

The Conjuring Music Box, Page 4

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All Products in pink-shop

Hellboy Good Samaritan Build RPF Costume and Prop Maker Community

Pink NPC/IFBB/WBFF Rhinestone Practice Posing Competition Suit - Bikin –

Show off your TLJ Luke lightsaber!!(balance v4), Page 2

What techniques and tools can be used to create realistic-looking props for film and television? - Quora

Mechanized: My prop collection (Updated: 7.8.20)

Raspberry Crystal Competition Bikini

Brass is Pink not Yellow

RPF Costume and Prop Maker Community

How does one make a movie prop in do-it-yourself fashion? What materials are commonly used? - Quora